Question

Resolva as equação a seguir, considerando que U=Q

a) 5x-(-2x+3) = 3x+7
b) 3 (x-6) - (-x+1) = 5x+8​

Answer 1

a)

5x-(-2x+3) = 3x+7

5x+2x-3=3x+7

5x+2x-3x=7+3

7x-3x=10

4x=10

x=10/4

x=(10÷2)/(4÷2) =5/2 x=5/2

b)

3.(x-6) - (-x+1)=5x+8

3x-18+x-1=5x+8

3x+x-5x=8+1+18

4x-5x=9+18

-x=27

x=27/-1

x=-27