Question

resolva a equação:

5x-12=3x

x+7=4x

2m-5=14-3m

3x+2-x=5-3

2y+12=y-3

ME AJUDEM POR FAVOR

Answer 1

Bom dia Kenji!


Solução!


$A)~~5x-12=3x \\\\\ 5x-3x=12 \\\\\ 2x=12 \\\\\ x= \dfrac{12}{2} \\\\\ x=6$




$B)~~ x+7=4x \\\\\ x-4x=-7 \\\\\ -3x=-7 \\\\\ x= \dfrac{-7}{-3}\\\\\ x= \dfrac{7}{3}$




$C~~2m-5=14-3m \\\\\ 2m+3m=14+5 \\\\\ 5m=19 \\\\\ m= \dfrac{19}{5}$




$D)~~3x+2-x=5-3 \\\\\ 3x-x=5-3-2 \\\\\ 2x=5-5 \\\\\ x= \dfrac{0}{2} \\\\\ x=0$




$E)~~2y+12=y-3 \\\\\ 2y-y=-3-12 \\\\\ y=-15$




Bom dia!
Bons estudos!

Answer 2

5x-3x=12
2x=12
x=12/2
x=6

x-4x=-7
-3x=-7
x=7/3

2m+3m=14+5
5m=19
m=19/5 ou m=3,8

3x-x=5-3-2
2x=0
x=0

2y-y=-3-12
y= -15