Question

equação: a) 3 (x + 2)=15 b) 5 (x - 1)=30 c) 3 (x - 1) - (2x - 4)=1 d) 7 (x - 1) - 2 ( x - 5 )=x - 5 por favor mim ajudar genteeeeee

Answer 1

a) 3.(x + 2) = 15
3x + 6 = 15
3x = 15 - 6
3x = 9
x = 9/3
x = 3

b) 5.(x - 1) = 30
5x - 5 = 30
5x = 30 + 5
5x = 35
x = 35/5
x = 7

c) 3.(x - 1) - (2x - 4) = 1
3x - 3 - 2x + 4 = 1
3x - 2x = 1 + 3 - 4
x = 0

d) 7.(x - 1) - 2.(x - 5) = x - 5
7x - 7 - 2x + 10 = x - 5
7x - 2x - x = - 5 + 7 - 10
4x = - 8
x = - 8/4
x = - 2

Answer 2

a
3( x + 2) = 15
3x + 6 = 15
3x = 15 - 6
3x = 9
x = 9/3 = 3***

b
5 ( x - 1) = 30
5x - 5 = 30
5x = 30 + 5
5x = 35
x = 35/5 = 7 ****

c
3 ( x - 1) - ( 2x - 4 ) =1
3x - 3 - 2x + 4 - 1 =0
x = 0 *****

d

7 ( x - 1) - 2 ( x - 5 ) = ( x - 5)
7X - 7 - 2X + 10 - X + 5 = 0
4X + 8 = 0
X + 2 = 0
X = -2 *****