Question

a)12x=-x+121
b)65+3x=-35-x
c)76+28x=18x-4
d)56x+56=42x+42

Answer 1

a)12x=-x+121
12x+x=121
13x=121
x=121/13

b) 65+3x=-35-x
3x+x=-35-65
4x=-100
x=-100÷4
x=-25

c)76+28x=18x-4
28x-18x=-4-76
10x=-80
x=-80÷10
x=-8

d) 56x+56=42x+42
56x-42x=42-56
14x=-14
x=-14÷14
x=-1