Solve in picture. Mathematics problem.

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asked Feb 25, 2017 83.3k views

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Marcello DeSales · Answer 1 · 2017-03-03T22:20:46+0000

Cross Multiplication!

(4)/(7)

=

4 × 21 = 7 × (x-3)
Distribute 7 into the parenthesis:
84 = 7x - 21
Take 21 to the other side:
84 + 21 = 7x
105 = 7x
Divide by 7 on both sides:

(105)/(7)

=

( 7 and 7 cancels out )
15 = x
x = 15

Solve in picture. Mathematics problem.

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