Question

Rezolva ecuatiile: a) 4(x+3)-7x=5(2-x)+17 b) 2(x+3)+5(1-2x)=2-x-3(x+1) c) 3( x+4)-5(2x+1)=4(x+3)-6(2x+3) Ajutati-ma!! Nu le inteleg!! :(((

Answer 1

$\displaystyle a) 4(x+3)-7x=5(2-x)+17 \\ 4x+12-7x=190-5x+17 \\ 4x-7x+5x=10+17-12 \\ 2x=15 \\ x= \frac{15}{2}$
$\displaystyle b) 2(x+3)+5(1-2x)=2-x-3(x+1) \\ 2x+6+5-10x=2-x-3x-3 \\ 2x-10x+x+3x=2-3-6-5 \\ -4x=-12 \\ x= \frac{12}{4} \\ x=3$
$c) 3( x+4)-5(2x+1)=4(x+3)-6(2x+3) \\ 3x+12-10x-5=4x+12-12x-18 \\ 3x-10x-4x+12x=12-18-12+5 \\ x=-13$