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

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

Hope this helps!! :)

Please let me know if you have any questions

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step-by-step explanation:

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ωє ιт ¢αи вє ωяιттєи αѕ

step-by-step explanation:

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