Question

*ME AJUDEM!*

A) -3=x+10

B) 15=x+20

C) 3x/4=30

D) 4x-7=8x-2

E)5x+4=3x-2+4

F)x+28=11

G)x-109=5

H)0=x+12

I)3x=15

J)4x=-12


*É PARA AMANHÃ!!!!!!!!!*


[VINTE PONTOS PARA QUEM SABER]

Answer 1

Explicação passo-a-passo:

a)-3=x+10

-x=10+3 (-1)

x=-10-3

x=-13

b)15=x+20

-x=20-15 (-1)

x=-20+15

x=-5

Answer 2

Resposta:

Ver abaixo

Explicação passo-a-passo:

$A)\\-3=x+10\\-3-10=x\\x=-13\\\\B)\\15=x+20\\15-20=x\\x=-5\\\\C)\\\frac{3x}{4}=30\\3x=30\;.\;4\\3x=120\\x=\frac{120}{3} \\x=40\\\\D)\\4x-7=8x-2\\4x-8x=-2+7\\-4x=5\\x=-\frac{5}{4}$

$E)\\5x+4=3x-2+4\\5x-3x=-2+4-4\\2x=2\\x=\frac{2}{2}\\x=1\\\\F)\\x+28=11\\x=11-28\\x=-17\\\\G)\\x-109=5\\x=5+109\\x=114\\\\H)\\0=x+12\\x=0-12\\x=-12$

$I)\\3x=15\\x=\frac{15}{3} \\x=5\\\\J)\\4x=-12\\x=\frac{-12}{4} \\x=-3$