Question

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

Answer 1

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

Answer 2

x=7/4 .............scriu mai mult unpic
3x+5-2(x+2)=8-3(1-x)
3x+5-2x=8-2-3x/+3x
3x+3x-2X=5+8-2-3
4x=7/:4
x=7:4
x=1.75

15-4(3x-8)=-1
15-12x-12=-1/-15
-12x=-1-15+12
-12x=-4/:12
x=3