Question

Encontre as raízes das equações de 1º Grau

a)X+7X=16
b)2X+5X-X=12
c)-X-3X=-8
d)15y-10y=-35
e)2X+2X=20

Answer 1

Resposta:

A) x+7x=16

8x=16

x=16÷8

x=2

B)2x+5x+x=12

6x=12

x=12÷6

x=2

C) -x-3x=-8

-4x=-8

x=-8÷(-4)

x= 2

D) 15y-10y=-35

5y=-35

y=-35÷5

y= -7

E) 2x+2x=20

4x=20

x=20÷4

x=5

Answer 2

Resposta:

$a)x+7x=16\\ 8x=16 \\x=\frac{16}{8}\\x=2 \\\\b)2x+5x-x=12\\6x=12\\x=\frac{12}{6}\\x=2\\\\c)-x-3x=-8\\-4x=-8\\x=\frac{-8}{-4}\\x=2\\\\d)15y-10y=-35\\5y=-35\\y=\frac{-35}{5}\\y= -7\\\\e)2x+2x=20\\4x=20\\x=\frac{20}{4}\\x=5$

acho que é isso, revisa os sinais que eu sou juca.