(5x-6).y=70
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a, \(231-\left(x-6\right)=1339:13\)
\(\Leftrightarrow231-\left(x-6\right)=103\)
\(\Leftrightarrow x-6=128\)
\(\Leftrightarrow x=134\)
Vậy .....
b, \(70-5\left(2x-3\right)=45\)
\(\Leftrightarrow5\left(2x-3\right)=25\)
\(\Leftrightarrow2x-3=5\)
\(\Leftrightarrow2x=8\)
\(\Leftrightarrow x=4\)
Vậy ....
c, \(156-\left(x+61\right)=82\)
\(\Leftrightarrow x+61=74\)
\(\Leftrightarrow x=13\)
Vậy ....
d, \(6\left(5x+35\right)=330\)
\(\Leftrightarrow5x+35=55\)
\(\Leftrightarrow5x=20\)
\(\Leftrightarrow x=4\)
Vậy ......
e, \(936-\left(4x+24\right)=72\)
\(\Leftrightarrow4x+24=864\)
\(\Leftrightarrow4x=840\)
\(\Leftrightarrow x=210\)
Vậy ...
231-(x-6)=1339:13
237-x=103
=>x=237-103=134
Vậy x=134
70-5(2x-3)=45
70-10x+15=45
=>-10x=45-15-70=-40
=>x=4
Vậy x=4
Các caau sau tương tự nhé bn
\(y\cdot6+y\cdot4=70\)
\(\Leftrightarrow y\cdot\left(6+4\right)=40\)
\(\Leftrightarrow10y=70\)
\(\Leftrightarrow y=7\)
a) \(70-5\left(2x-3\right)=45\)
\(70-10x+15=45\)
\(-10x=45-70-15\)
\(-10x=-40\)
\(x=4\)
vay \(x=4\)
b) \(156-\left(x+61\right)=82\)
\(x+61=156-82\)
\(x+61=74\)
\(x=74-61\)
\(x=13\)
vay \(x=13\)
c) \(6\left(5x+35\right)=330\)
\(30x+210=330\)
\(30x=330-210\)
\(30x=120\)
\(x=4\)
vay \(x=4\)
d) \(936-\left(4x+24\right)=72\)
\(4x+24=936-72\)
\(4x+24=864\)
\(4x=864-24\)
\(4x=840\)
\(x=210\)
vay \(x=210\)
\(70-5.\left(2x-3\right)\)\(=45\)
\(5.\left(2x-3\right)\)\(=\)\(70-45\)
\(5.\left(2x-3\right)\)\(=25\)
\(2x-3=25:5\)
\(2x-3=5\)
\(2x=8\)
\(x=8:2\)
\(x=4\)
\(156-\left(x+61\right)\)\(=82\)
\(x+61=156-82\)
\(x+61=74\)
\(x=74-61\)
\(x=13\)
\(6.\left(5x+35\right)\)\(=330\)
\(5x+35=330:6\)
\(5x+35=55\)
\(5x=55-35\)
\(5x=20\)
\(x=20:5\)
\(x=4\)
\(936-\left(4x+24\right)\)\(=72\)
\(4x+24=936-72\)
\(4x+24=864\)
\(4x=864-24\)
\(4x=840\)
\(x=840:4\)
\(x=210\)
Mình chỉ biết làm câu 1 thui
5x-2y=4y=3z-4y
5x= 4y+2y=3z-4y
5x=6y=3z-4y
5x=-3z=-4y-6y
5x=-3z=10y
Vì ba số này bằng nhau nén mình có thể đổi vị trí được
=>5x=10y=-3z
=>(5+10-3).(x+y-z)
=>12.70
=840
b) 231−(x−6)=1339:13231−(x−6)=1339:13\
231−(x−6)=103231−(x−6)=103
x−6=231−103=128x−6=231−103=128
x=128+6=134
b, \left(32.15\right):2=\left(x+70\right):14-40(32.15):2=(x+70):14−40
\Rightarrow\left(x+70\right):14-40=480:2⇒(x+70):14−40=480:2
\Rightarrow\left(x+70\right):14=240+40=280⇒(x+70):14=240+40=280
\Rightarrow x+70=3920\Rightarrow x=3850⇒x+70=3920⇒x=3850
c, x-4867=\left(175.2050.70\right):25+23x−4867=(175.2050.70):25+23
\Rightarrow x=39462500:25+23+4867⇒x=39462500:25+23+4867
\Rightarrow x=1578500+23+4867=1583390⇒x=1578500+23+4867=1583390
c=20
\(3\left(5^x-1\right)-2=70\\ \Rightarrow3.5^x-3-2=70\\ \Rightarrow3.5^x-5=70\\ \Rightarrow3.5^x=75\\ \Rightarrow5^x=25\\ \Rightarrow x=2\)
\(3.\left(5^x-1\right)-2=70\)
\(\Leftrightarrow3.\left(5^x-1\right)=70+2\)
\(\Leftrightarrow3.\left(5^x-1\right)=72\)
\(\Leftrightarrow5^x-1=72:3\)
\(\Leftrightarrow5^x-1=24\)
\(\Leftrightarrow5^x=24+1\)
\(\Leftrightarrow5^x=25\)
\(\Leftrightarrow5^x=5^2\)
\(\Leftrightarrow x=2\)
Vậy \(x=2\)
Đề bài yêu cầu gì?