I assume you want to solve this equation for b. If that is the case, merely divide both sides of this equation by 5:
5b = -35
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5 5
Then b = -7 (answer)
2/5 = 40%. 100 divided by 5 = 20 x 2 = 40%
Mary has 4 marbles because Joan has 100 marbles and he has 25 times as many marbles as Mary so we divide :)
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Answer:</h2>
Tia earns $693 in 36 hours
The equation is already set up for you. All you need to do is solve for x, the number of hours.
23 + 3x = 5x + 7 original equation
23 - 7 = 5x - 3x combine like terms by subtracting 7 and 3x from both sides
16 = 2x simplify
16/2 = x divide both sides by 2 to isolate x
8 = x solve for x
Therefore, the answer is 8 hrs.
