Question

Me ajude nessas equações
A) × + 5 = 7
b) 2× = 10
c) 5× = 2× +15
d) 6× - 3 = 5× +7
e) 7× + 12 = 2× + 22

Answer 1

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

b)2x=10
x=10/2
x=5

c)5x=2x+15
5x-2x=15
3x=15
x=15/3
x=5

d) 6x-3=5x+7
6x-5x=7+3
1x=10
x=10/1
x=10

e)7x+12=2x+22
7x-2x=22-12
5x=10
x=10/5
x=2