Question

Resolva as equações :

a)9x-3(2x+2)=15. b)2,5(x-2)-1,5x=1

Answer 1

a)
9x-3(2x+2)=15

9x-6x-6 =15

9x-6x=15+6

3x=21

X=21/3

X=7

b)
2,5(x+2)-1,5=1

2,5x-5-1,5x=1

2,5x-1,5x=1+5

X=6