Question

Rezolvati ecuatiile,x€Z:
a) 3x+5-2(x+2)=8-3(1-x)
b) 15-4(3x-8)=-1

Answer 1

$\displaystyle a). 3x+5-2(x+2)=8-3(1-x) \\ 3x+5-2x-4=8-3+3x \\ 3x-2x-3x=8-3-5+4 \\ -2x=4 \\ x=- \frac{4}{2} \\ x=-2 \\ b) .15-4(3x-8)=-1 \\ 15-12x+32=-1 \\ -12x=-1-15-32 \\ -12x=-48 \\ x= \frac{-48}{-12} \\ x=4$