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fiasKO [112]
3 years ago
14

Solve the system by substitution -4-y=17 and 4y=x

Mathematics
1 answer:
allochka39001 [22]3 years ago
7 0

Answer:

x = -84

y = -21

Step-by-step explanation:

4 - y = 17

4y = x

Use the first equation to solve for y

4 - y = 17

y = 4 -  17

y = -21

In the second equation, get y on its own.

4y = x

y = x/4

Substitute the new second equation into the new first equation

-21 = x/4

-21 * 4 = x

x = -84

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