Question

a) X – 6 = 7
b) a + 9 = 10
c) 2x – 6 = 20
d) 4 t – 6 = 26
e) 3y + 5 = -1
f) 3x + 10 = 5x – 6
g) 9 x + 16 = 5x + 64
h) 4 + 2x = 3x - 19
i) 3( a – 4) = 12
j) 6(x + 1) = 5
k) 5(y + 3) = y + 1
l) 12(t – 3) = 6(t +1) – 5

Answer 1

Explicação passo-a-passo:

a) x - 6 = 7 ==> x = 7 + 6 ==> x = 13

b) a + 9 = 10 ==> a = 10 - 9 ==> a = 1

c) 2x - 6 = 20 ==> 2x = 20 + 6 ==> 2x = 26 ==> x = 26/2 ==> x = 13

d) 4t - 6 = 26 ==> 4t = 26 + 6 ==> 4t = 32 ==> t = 32/4 ==> t = 8

e) 3y + 5 = -1 ==> 3y = - 1 - 5 ==> 3y = - 6 ==> y = - 6/3 ==> y = -2

f) 3x + 10 = 5x - 6 ==> 10 + 6  = 5x -3x ==> 16 = 2x ==> 16/2 = x ==> x = 8

g) 9x + 16 = 5x + 64 ==> 9x - 5x = 64 - 16 ==> 4x = 48 ==> x = 48/4 ==> x = 12

h) 4 + 2x = 3x - 19 ==> 4 + 19 = 3x - 2x ==> x = 23

i) 3 (a - 4) = 12 ==> 3a - 12 = 12 ==> 3a = 12 + 12 ==> 3a = 24 ==> a = 24/3 ==> a = 8

j) 6 (x + 1) = 5 ==> 6x + 6 = 5 ==> 6x = 5 - 6 ==> 6x = -1 ==> x = -1/6

k) 5 (y + 3) = y + 1 ==> 5y + 15 = y + 1 ==> 5y - y = 1 - 15 ==> 4y = - 14 ==> y = -14/4 ==> y = -7/2

l) 12 (t - 3) = 6(t + 1) - 5 ==> 12t - 36 = 6t + 1 -5 ==> 12t - 6t = 1 - 5 +36 ==> 6t = 32 ==> t = 32/6 ==> t = 16/3