Is it all right and i need on evaluate expressions. plz me

(1)   12,    (2)   5,    (3)   13,    (4)    30

Step-by-step explanation:

(1)Given expression 2x.

Substitute x = 6 in expression 2x.

⇒ 2 × 6 = 12

(2)Given expression 8 + 3 – x

Substitute x = 6 in expression 8 + 3 – x.

⇒ 8 + 3 – 6 = 11 – 6 = 5

(3)Given expression 6 + 7 – 6 + x

Substitute x = 6 in expression 6 + 7 – 6 + x.

⇒ 6 + 7 – 6 + x = 6 + 7 – 6 + 6 = 13

(4)Given expression 5x

Substitute x = 6 in expression 5x.

⇒ 5× 6 = 30

step-by-step explanation: yes

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step-by-step explanation:

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