Question

Evaluate 9(4x – 15) if x = 3.

Answer 1

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$\: 9 \: (4x - 15)$

Plugging in the value $x = 3$ in the above expression, we have

➼ $\: 9 \: (4 \times 3 - 15)$

➼ $\: 9 \: (12 - 15)$

➼ $\: 9 \: ( - 3)$

➼ $\: - 27$

Note:-

$\sf\pink{PEMDAS\: rule.}$

P = Parentheses

E = Exponents

M = Multiplication

D = Division

A = Addition

S = Subtraction

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Answer 2

Answer:

-27

Step-by-step explanation:

9(4x – 15)

Substitute 3 for x

9((4)(3) - 15)

Multiply (4)(3) = 12

9 ( 12 - 15 )

Subtract 12 - 15 = -3

9(-3)

Multiply 9(-3) = -27