Question

a) 4 x + 20 = 100
b)2x+10=x+70
C)2x+5=120
d) 6x-11=5x-3​

Answer 1

a)

$4x + 20 = 100 \\ 4x = 100 - 20 \\ x = \frac{100 - 20}{4} \\ x = 25 - 20 \\ x = 5$

b)

$2x + 10 = x + 70 \\ 2x - x = 70 - 10 \\ x = 60$

c)

$2x + 5 = 120 \\ 2x = 120 - 5 \\ x = \frac{120 - 5}{2} \\ x = 60 - 5 \\ x = 55$

d)

$6x - 11 = 5x - 3 \\ 6x - 5x = - 3 + 11 \\ x = 8$