Question

Rewrite the formula to find w.

Answer 1

Answer:  The required value of 'w' is 5 units.

Step-by-step explanation:  We are given the following formula:

$P=2l+2w~~~~~~~~~~~~~~~~~~~~~~~(i)$

We are given to find 'w' in units given that  P = 30 units and l = 10 units.

Substituting the values of 'P' and 'l' in equation (i), we get

$P=2l+2w\\\\\Rightarrow 30=2\times 10+2\times w\\\\\Rightarrow 30=20+2w\\\\\Rightarrow 2w=10\\\\\Rightarrow w=5.$

Thus, the required value of 'w' is 5 units.

Answer 2

P = 2L +2W
P - 2L = 2W
(P - 2L)÷2 = W

If P = 30 and L = 10, substitute

W = (30 - 2(10)) ÷ 2
W = (30-20) ÷ 2
W = 10 ÷ 2
W = 5