Question

resolva as equações: 5.(3-2a)=55 27=3.(x+3) 16x+2.(7x+8)-9=67

Answer 1

15-10a=55

-10a=55-15

-10a=40

-a=40/10

-a=4

a=-4

27=3x+9

-3x=9-27

-3x=-18

x=-18/-3

x=6

16x+14x+16-9=67

30x+7=67

30x=67-7

30x=60

x=60/30

x=2

(para mais informações, me mande uma MP).

Answer 2

$5.(3-2a)=55\to 15-10a=55\to -10a=55-15\to \\\\ -10a=40(-1)\to 10a=-40\to a= -\frac{40}{10} \to a= -4 \\\\\\\\\\27=3.(x+3)\to 27=3x+9\to 27-9=3x\to 18=3x\to \\\\ \frac{18}{3} =x\to x=6$




$16x+2.(7x+8)-9=67\to 16x+14x+16-9=67\to \\\\ 16x+14x=67-16+9\to 30x=60\to x= \frac{60}{30} \to x=2$