Question

Ajutatima va rog Ajutatima sa rezolv ecuatiile : 5x+4=0. ; 3(2x-1)+4=7. ; 2(x-1)-5x=18-7x.

Answer 1

5x+4=0
5x=-4
x=-4/5
3(2x-1)=7-4
6x-3=3
6x=3+3
6x=6
x=1
2x-2-5x=18-7x
7x-3x=18+2
4x=20
x=5

Answer 2

$\displaystyle a).5x+4=0 \\ 5x=0-4 \\ 5x=-4 \\ x=- \frac{4}{5} \\ b).3(2x-1)+4=7 \\ 6x-3+4=7 \\ 6x=7+3-4 \\ 6x=6 \\ x= \frac{6}{6} \\ x=1 \\ c).2(x-1)-5x=18-7x \\ 2x-2-5x=18-7x \\ 2x-5x+7x=18+2 \\ 4x=20 \\ x= \frac{20}{4} \\ x=5$