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1)300:x-20:x=280:4
300:x-20:x=70
(300-20):x=70
280:x=70
x=280:70
x=4
2)x-63.11=156.420
x-693=65520
x =65520+693
x =66213
15,6 x 260 - 156 x 26=0
15,6 x 3,3 x 3,4 x 2,6= 455,0832
=15,6 x10 x26 -156 x 26 / 15,6 x 3,3 x 3,4 x 2,6
=156 x 26 - 156 x 26 /
=0 / 15,6 x 3,3 x 3,4 x 2,6
=0
100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
a) \(x-285\div35=5\times54\)
\(x-\dfrac{57}{7}=270\)
\(x=\dfrac{1947}{7}\)
b) \(\left(x+120\right)\div20=8\)
\(x+120=160\)
\(x=40\)
c) \(\left(x+5\right)\times3=300\)
\(x+5=100\)
\(x=95\)
d) \(\left(x+100\right)\times4=800\)
\(x+100=200\)
\(x=100\)
a) \(x-285:35=5x54\)
\(x-\dfrac{57}{7}=270\)
\(x=270+\dfrac{57}{7}=\dfrac{1890}{7}+\dfrac{57}{7}=\dfrac{1947}{7}\)
b) \(\left(x+20\right):20=8\)
\(\left(x+20\right)=8x20\)
\(x+20=160\)
\(x=160-20=140\)
c) \(\left(x+5\right)x3=300\)
\(x+5=300:3\)
\(x+5=100\)
\(x=100-5=95\)
d) \(\left(x+100\right)x4=800\)
\(x+100=800:4\)
\(x+100=200\)
\(x=200-100=100\)
=\(\frac{15.6x26x10-15.6x10x26}{15.6x3.3x3.4x2.6}\)
=\(\frac{0}{15.6x3.3x3.4x2.6}\)
=0
121 :x =11
x=121:11
x=11
20+x=300+60
20+x=360
x=360-20
x=340
25x10-3
=250-3
=247
121 : x = 11
x = 121 : 11
x = 11
20 + x = 300 + 60
20 + x = 360
x = 360 - 20
x = 340
25 x 10 - 3 = 250 - 3
= 247
300 : x - 20 : x = 70
=> (300-20):x =70
=> 280 : x= 70
=> x = 280 : 70 = 4
x-63.11 = 156.402
=> x-693 = 62712
=> x=62712+69363405
x : 100 = 15,6
=> x=15,6 . 100 = 1560
\(x=15,6\times100\)
\(x=1,560\)