Question

Resolva as equações
a) X– 2 = 10
b) X– 5 = 15
c) X– 3 = 2
d) X + 4 = 8
e) X =+ 3 = 1
f) X + 8 = 10
g) X + 3 = 10
h) X– 3 =-1
i) 2x =-8
j) 2x = 0
k) 3y = 18
l) 2x + 4 = 6
m)– 3x = 6
n) 4x =- 16
o)– 2y = 0
p) 3y + 1 = 10

Answer 1

$x - 2 = 10 \\ x - = 10 + 2 \\ x = 12 \\ \\ x - 5 = 15 \\ x = 15 + 5 \\ x = 20 \\ \\ x - 3 = 2 \\ x = 2 + 3 \\ x = 5 \\ \\ x + 4 = 8 \\ x = 8 - 4 \\ x = 4 \\ \\ x + 3 = 1 \\ x = 1 - 3 \\ x = - 2 \\ \\ x + 8 = 10 \\ x = 10 - 8 \\ x = 2 \\ \\ x + 3 = 10 \\ x = 10 - 3 \\ x = 7 \\ \\ x - 3 = - 1 \\ x = - 1 + 3 \\ x = 2 \\ \\ 2x = - 8 \\ x = \frac{ - 8}{2} \\ x = - 4 \\ \\ 2x = 0 \\ x = \frac{0}{2} \\ x = 0 \\ \\ 3y = 18 \\ y = \frac{18}{3} \\ y = 6 \\ \\ 2x + 4 = 6 \\ 2x = 6 - 4 \\ x = \frac{2}{2} \\ x = 1 \\ \\ - 3x = 6 \\ x = \frac{6}{ - 3} \\ x = - 2 \\ \\ 4x = - 16 \\ x = \frac{ - 16}{4} \\ x = - 4 \\ \\ - 2y = 0 \\ y = \frac{0}{ - 2} \\ y = 0 \\ \\ 3y + 1 = 10 \\ 3y = 10 - 1 \\ y = \frac{9}{3} \\ y = 3$