Question

Efectuați:
a) 2(7x+1)=5(2x+3)+1
b) 4(5x+3)-7=3(4x+5)
c) 7(3x-1)+3=3(20-x)
d) 8(12+x)=x+7(16-x)
Vă rog din suflet!
Dau coroană+Mulțumesc!

Answer 1

$a)14x+2=10x+15+1$
$14x-10x=15+1-2$
$4x=14==\ \textgreater \ x= \frac{7}{2}$
[tex]b)20x+12-7=12x+15 [/tex]
$20x-12x=15-12+7$
$8x=10==\ \textgreater \ x= \frac{5}{4}$
$c)21x-7+3=60-3x$
$21x+3x=60+7-3$
$24x=64==\ \textgreater \ x= \frac{8}{3}$
$d)96+8x=x+112-7x$
$8x-x+7x=112-96$
$14x=16==\ \textgreater \ x= \frac{8}{7}$