Question

Resolva as equações
X-13=18
5x-16=2x+32
6x+12=-2x+100
7x-32=2x+43

Answer 1

x-13=18
x=18+13
x= 31

5x-16=2x+32
$5x - 2x = 32 + 16 \\ 3x = 48 \\ x = \frac{48}{3} \\ x = 16$

6x+12=-2x+100
6x+2x=100-12
8x=88
x=11

7x-32=2x+43
7x-2x=43+32
5x=75
x=15

Answer 2

x - 13 = 18
x = 18 + 13
x = 31

5x - 16 = 2x + 32
5x - 2x = 32 +16
3x = 48
x = 48/3
x = 16

6x + 12 = - 2x + 100
6x + 2x = 100 - 12
8x = 88
x = 88/8
x = 11

7x - 32 = 2x + 43
7x - 2x = 43 +32
5x = 75
x = 15