Question

How do i solve these:
the bottom 3

Answer 1

Solution given:

25.

-8r=64

dividing both side by -8

-8r/-8=64/-8

r=-8

27.

3/7*m=6

multiplying both side by 7/3 we get

3/7*m*7/3=6*7/3

m=2*7

m=14

28.

-2/5*y=4

multiplying both side by -5/2

-2/5*y*-5/2=4*-5/2

y=2*-5

y=-10

30.

2a=1/5

dividing both side by 2

2a/2=1/5*1/2

a=1/10