Solve the equation 3(x - 7) = 42
2 answers:
X = 21 To solve the equation, follow these steps. 3(x-7) = 42 Distribute the three into the parenthesis: 3x - 21 = 42 Isolate the variable, x, by first doing the inverse operation: add 21 to both sides to cancel it out 3x = 63 Now to isolate the variable entirely, divide both sides by 3 as divide is the inverse of multiply. x = 21 To check this, input 21 as x in the equation: 3 (21-7) = 42 Subtract 21 and 7: 3 (14) = 42 42 = 42 Hope this helps!
Answer:
x=21.
Step-by-step explanation:
First you distribute 3 to the parenthesis. You should get 3x-21=42 at this point. Then you add 21 to 42 to get 63. Here you should be at 3x=63. Divide 63 by 3 to get x=3
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