Question

1)resolva as equações dadas abaixo

a) 2(×+1)=3×+10
b)5(×+3)=4 (2×-10
c)13+×+4 (×+7)=28

Answer 1

a) 2(x+1)=3x+10
2x+2=3x+10
2x-3x=10-2
-x=8 .(-1)
x=-8

b)5(x+3)=4 (2x-10)
5x+15=8x-40
5x-8x=-40-15
-3x=-55 .(-1)
3x=55
x=55/3

c)13+x+4 (x+7)=28
13+x+4x+28=28
x+4x=28-13-28
5x=-13
x=-13/5