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Pepsi [2]
2 years ago
10

WRITE AN EQUATION FOR EACH OF THESE AND SOLVE IT TO FIND THE VALUE OF THE UNKNOWN NUMBER:

Mathematics
2 answers:
castortr0y [4]2 years ago
8 0

a) a *5+5= 20

5a + 5 = 20

5a = 20 - 5

5a = 15

a = 15/5

a = 3

b) b/5 - 5 = 4

b/5 = 4 + 5

b/5 = 9

b =9*5

b = 45

san4es73 [151]2 years ago
8 0
A)

Let the number we think be x.

Then,

According To The Question

=( x × 5 ) + 5 = 20
= x × 5 = 15
= x = 15/5 = 3


b)

Let the number we think be x.

Then,

According To The Question

=( x/5 ) - 5 = 4
= x/5 =9
= x = 9 × 5 = 45

HOPE THIS WILL HELP YOU
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