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# Mark Z.

## Certified Mathematics Teacher (AP Calc, SAT, ACT, GRE)

### Astoria, NY (11105)

10 miles
Hourly fee
\$50.00

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## Mark's Resources

First, let's distribute the left hand side: 4*3 - 4*2x = -44 12 - 8x = -44 Next, isolate our variable. We're going to do this by subtracting 12 from both sides of the equation. -8x = -44 - 12 = -56. Lastly, divide by -8 on both sides to get x completely alone...

Multiply both sides by x: 2 = 12x. Divide by 12 on both sides to isolate our variable x: 2/12 = x Reducing this fraction by factoring 2 out of top and bottom, we get x = 1/6.

Let x be the money he invested at 6% interest, and y be the money he invested at 4%. Now we know that x+y = 29,000, because that is the total amount he invested. Let's convert the percent annual interest to decimals: 6% = 0.06 and 4% = 0.04. To do this, divide 6% by 100%. The percent...

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