Question

A)2x+18=5x B)6y+3=5y C)x+7=4x D)x-8=6x E)7x+3=2x+23 F)2m-5=14-3m G)2x-1=5x+20 H)2y+12=y-3 I)x+3+4x-1 J)x-6+5x+8-x

Answer 1

Olá Sidney,
Como vai?
Vamos lá,

(A)

2x + 18 = 5x
2x - 5x = -18
-3x = -18 (-1)
x = 18 / 3
x = 6

(B)

6y + 3 = 5y
6y - 5y = -3
y = -3

(C)

x + 7 = 4x
x - 4x = -7
-3x = -7 (-1)
x = 7 / 3

(D)

x - 8 = 6x
x - 6x = 8
-5x = 8
x = 8 / (-5)
x = - 1,6

(E)

7x + 3 = 2x + 23
7x - 2x = 23 - 3
5x = 20
x = 20 / 5
x = 4

(F)

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

(G)

2x - 1 = 5x + 20
2x - 5x = 20 + 1
-3x = 21
x = 21 / (-3)
x = - 7

(H)

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

(I)

x + 3 + 4x - 1
5x + 2

(J)

x - 6 + 5x + 8 - x
5x + 2

Espero ter ajudado (:
Bons estudos!