Question

3)
a) (a-100):5=20
b) 70+30a=100
c) 80x(a+5)=1600
d) a:5=200:4
e) 5x(8+a)x6=300
f) (a-4)x5=100

Answer 1

a) (a-100):5=20

a-100 = 100

a = 200

b) 70+30a=100

30a = 30

a = 1

c) 80x(a+5)=1600

a+5=20

a = 15

d) a:5 = 200:4

a:5 = 50

a = 250

e) 5x(8+a)x6=300

8+a= 300:30

8+a=10

a = 2

f) (a-4)x5=100

a-4 =20

a =24