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If m= 7x and m = 3x + 20, what is the value of x? a 10 4 7 5
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If m= 7x and m = 3x + 20, what is the value of x? a 10 4 7 5

User Zack Butcher
by
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1 Answer

3 votes
Equate the expressions for m.
7x = 3x + 20
4x = 20 . . . . . . . subtract 3x
x = 20/4 = 5 . . . divide by 4

The value of x is 5.
User Alexander Arendar
by
7.8k points
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