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\(1) 420+65.4=(x+175):5+30\)
\(\implies 420+260=(x+175):5+30\)
\(\implies 680=(x+175):5+30\)
\(\implies 650=(x+175):5\)
\(\implies 650.5-175=x\)
\(\implies 3075=x\)
\(2)x-4867=(175.2050.70):25+23\)
\(\implies x-4867=1004500+23\)
\(\implies x-4867=1004523\)
\(\implies x=1009390\)
\(3) 134-[(96-7x):4-2]=126\)
\(\implies (96-7x):4-2=8\)
\(\implies(96-7x):4=10\)
\(\implies 96-7x=40\)
\(\implies 7x=56\)
\(\implies x=8\)
\(4) 4-\{100-[(100-5x):8-5]:10\}:25=0\)
\(\implies 4-\{100-[(100-5x):8-5]:10\}=0\)
\(\implies 100-[(100-5x):8-5]:10=4\)
\(\implies 100-[(100-5x):8-5]=40\)
\(\implies (100-5x):8-5=60\)
\(\implies (100-5x):8=65\)
\(\implies 100-5x=520\)
\(\implies 5x=-420\)
\(\implies x=-84\)
~ Hok tốt a~
\(\frac{x}{27}-\frac{2}{9}=\frac{6}{18}\)
\(\frac{x}{27}=\frac{6}{18}-\frac{2}{9}\)
\(\frac{x}{27}=\frac{3}{9}-\frac{2}{9}\)
\(\frac{x}{27}=\frac{1}{9}\)
\(\frac{x}{27}=\frac{3}{27}\)
\(x=3\)
Ấy nhầm, làm lại nha:
\(\frac{x}{27}-\frac{2}{9}=\frac{6}{18}\)
\(\frac{x}{27}=\frac{6}{18}+\frac{2}{9}\)
\(\frac{x}{27}=\frac{3}{9}+\frac{2}{9}\)
\(\frac{x}{27}=\frac{5}{9}\)
\(\frac{x}{27}=\frac{15}{27}\)
\(x=15\)
Bài 1 . Tìm x biết :
a) 110,25 - x = 17,2 . 3 + 5,6
110,25 - x = 51,6 + 5,6
110,25 - x = 57,2
x = 110,25 - 57,2
x = 53,05
Vậy x = 53,05
b) 42 - x = 105 : 15 + 18
42 - x = 7 + 18
42 - x = 25
x = 42 - 25
x = 17
Vậy x = 17
a) 10*(x-1)=15-5
10*(x-1)=10
(x-1)=10:10
(x-1)=1
x=1+1
x=2
b) x+1+x+2+x+3=18
3x+6=18
3x=18-6
3x=12
x=12:3
x=4
c) 17+2*(x+2)=25
2*(x+2)=25-17
2*(x+2)=8
x+2=8:2
x+2=4
x=4-2
x=2
d) x:17=82-17+26
x:17=91
x=91*17
x=1547
e) 147*x=441
x=441:147
x=3
g)(x:81)=330:10:11
(x:81)=3
x=3*81
x=243
i)x+1+x+2+x+3+x+4+x+5=40
5x+15=40
5x=40-15
5x=25
x=5
Ủng hộ nha
bạn làm sao ấy đề mink viet khac ma ban vite mot neo
\(49-x+12=30\)
\(49-x=30-12\)
\(49-x=18\)
\(x=49-18\)
\(x=31\)
Vậy \(x=31\)
\(\left(x+1\right)+\left(x+2\right)+\left(x+3\right)=18\)
\(x+1+x+2+x+3=18\)
\(x+x+x+1+2+3=18\)
\(3x+6=18\)
\(x=18-6\)
\(3x=12\)
\(x=12:3\)
\(x=4\)
Vậy \(x=4\)
950 : x = 76
x = 950 : 76
x = 12,5
77,9 : x = 82
x = 77,9 : 82
x = 0,95
Vì x là thừa số chung nên (35,5+2,5):x=15
38:x=5
x=38:5
x=7,6
882:(2x-15)=18
2x-15=882:18
2x-15=49
2x=49+15
2x=64
x=32
k mk nha
mk nhanh nhất
882;(2.x-15)=18
2.x-15=822:18=49
2.x=49+15=64
x=64:2=32