Question

Preciso das resoluções dessas equações :)

Answer 1

e) 13 +4 ( 2x -1) = 5 (x +2)
13 + 8x - 4 = 5x + 10
8x - 5x= 10 -13 +4
3x = -3 +4
3x= 1
x= $\frac{1}{3}$

f) 4 (x +5) + 3 (x +5) =21
4x + 20 + 3x + 15 = 21
4x +3x = 21 -20 -15
7x = 1 - 15
7x= - 14
x= $\frac{-14}{7}$
x= -2

g) 2 (x+5) -3 (5 -x) =10
2x + 10 - 15 + 3x =10
2x +3x = 10 -10 +15
5x= 15
x= $\frac{15}{5}$
x= 3

h) 8 (x -1) = 8 - 4 (2x - 3)
8x - 8 = 8 - 8x + 12
8x + 8x = 8 + 12 +8
16x = 20 +8
16x= 28
x= $\frac{28}{16}$
x= 1,75