Question

Solve for L P = 2l + 2w if W = 7 inches and P = 42 inches

Answer 1

Answer: L = 14

Concept:

Here, we need to understand the idea of evaluation.  

When encountering questions that gave you an expression with variables, then stated: "If x = a, y = b, z = c" (a, b, c are all constants), this means you should substitute the value given for each variable back to the expression.

Solve:

Given information

W = 7

P = 42

Given expression

P = 2L + 2W

Substitute values into the expression

42 = 2L + 2 (7)

Simplify by multiplication

42 = 2L + 14

Subtract 14 on both sides

42 - 14 = 2L + 14 - 14

28 = 2L

Divide 2 on both sides

28 / 2 = 2L / 2

$\boxed{L=14}$

Hope this helps!! :)

Please let me know if you have any questions

Answer 2

Answer:

L=14

Step-by-step explanation:

P=2L+2W

W=7

P=42

2W=14

P-2W

42-14

=28

2L=28

L=28÷2

=14

Hope this helps.

It might be wrong so sorry