Question

Determinati solutiile ecuatilor:
5 *( 6+2 *x) =60
(13 + x) :15 =15
(x +17) *4 = 63+17
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Answer 1

5*(6+2*x)=60
30+10x=60
10x=60-30
x=30/10
x=3
(13+x):15=15
13+x/15=15
13x+x=15*15
13+x=225
x=225-13
x=212
(x+17)*4=63+17
4x+68=80
4x=80-68
x=12/4
x=3