Question

If 3(x −1) = 21, value of 7x is

Answer 1

Step-by-step explanation:

3(x-1)=21

3x-3=21

3x=21-3

x=18/3

x=6

therefore , 7x = 7×6=42

Answer 2

Answer:

8

Step-by-step explanation:

Solve for x:

3 (x - 1) = 21

Divide both sides of 3 (x - 1) = 21 by 3:

(3 (x - 1))/3 = 21/3

3/3 = 1:

x - 1 = 21/3

The gcd of 21 and 3 is 3, so 21/3 = (3×7)/(3×1) = 3/3×7 = 7:

x - 1 = 7

Add 1 to both sides:

x + (1 - 1) = 1 + 7

1 - 1 = 0:

x = 7 + 1

7 + 1 = 8:

Answer:

x = 8

7x = 7×8 = 56

By the way, you are a moron who can't even solve these kinda things.

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