Question

Упростите алгебраическое выражение и найдите его значение: 3(5-4а)-(12а-7)при а=0,5 помогите.

Answer 1

15-12а-12а+7=22-24а
Если а=0,5= 22-24х0,5 =10

Answer 2

Simplifying and Evaluating an Algebraic Expression

To simplify the algebraic expression 3(5-4a)-(12a-7) and find its value when a=0.5, we can follow these steps:

1. Substitute the value of a into the expression. 2. Simplify the expression using the given value of a.

Let's proceed with the calculation.

Substitute a=0.5 into the expression: 3(5-4*0.5)-(12*0.5-7)

Simplify the expression: 3(5-2)-(6-7) = 3(3)-(6-7) = 9-(6-7) = 9-(-1) = 9+1 = 10

Therefore, the value of the expression 3(5-4a)-(12a-7) when a=0.5 is 10.

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