Question

Find the value of y if 5(Y+7)= 105 *​

Answer 1

Answer:

ANSWER

2x+y=7

Put, x=2

2(2)+y=7

4+y=7

y=−4+7

∴y=3.

Answer 2

Given:

5(y + 7) = 105

What to do?

Find the value of y in the above equation.

Solution:

5(y + 7) = 105

Remove the brackets,

⇒ 5y + 35 = 105

Take 35 to RHS,

⇒ 5y = 105 - 35

Subtract 35 from 105,

⇒ 5y = 70

Take 5 to RHS,

⇒ y = $\frac{70}{5}$

Divide 70 by 5 in RHS,

⇒ y = 14

To verify:

5(y + 7) = 105

Substitute the value of y,

⇒ 5(14 +7) = 105

Solve the brackets,

⇒ 5(21) = 105

Multiply 5 by 21,

⇒ 105 = 105

∴ Hence the value of y is 14.