Question

qual a equaçao de a)5x+3x=16 b)x+x+8=54 c 7x-2-5x=18

Answer 1

$5x + 3x = 16 \\ 8x = 16\\ x = 16 \\ ÷ 2 \\ x = 8 \\ \\ x + x + 8 = 54 \\ 2x = 54 - 8 \\2x = 46 \\ x = 46 \div 2 \\ x = 23 \\ \\ C)7x - 2 - 5x = 18 \\ 2x = 18 + 2 \\ 2x = 20 \\ x = 20 \div 2 \\ x = 10$
Pronto, está aí os cálculos.

Answer 2

a) 5x+3x=16
8x=16
x=16/2
x=8

b) x+x+8=54
x+x=54 - 8
2x=46
x=46/2
x= 23

c)7x - 2 - 5x=18
7x-5x=18 + 2
2x=20
x=20/2
x=10