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Liula [17]
3 years ago
8

How to solve a system of equations by substitution

Mathematics
1 answer:
kirill115 [55]3 years ago
4 0
First, substitute y in 3x-2y=9 for what it says y equals (2x-7). You now have: 3x-2(2x-7)=9. Breakdown:
3x-2(2x-7)=9
3x-4x+14=9
-1x=-5
x=5
next solve for y
y=2x-7
y=2(5)-7
y=10-7
y=3
<span>So Now We Have x=5, and y=3.
</span>Hope That Helped =D
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Genrish500 [490]
You lost minus when you were adding two equations.
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Check:
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8 0
3 years ago
A copy machine repairman makes $12.50 per hour plus $4 for every service call he performs. Last week he worked 34 hours and made
Slav-nsk [51]
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5 0
3 years ago
There are 2.54 centimeters in 1 inch. There are 100 centimeters in 1 meter. To the nearest inch, how many inches are in 2 meters
AlekseyPX

Answer:

79 inches

Step-by-step explanation:

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