Question

A) 2×+5+×+7=18
B) 5×-91=4×-7
C) 7×+1=5×-7.

Answer 1

Resposta:

a)x=2

b)x=84

c)X=-4

Explicação passo-a-passo:

a)2x+5+x+7=18

3x=18-7-5

3x=18-12

3x=6

x=6/3

x=2

b)5x-91=4x-7

5x-4x=-7+91

x=84

c)7x+1=5x-7

7x+1-5x+7=0

2x+8=0

2x=-8

x=-8/2

x=-4