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3 years ago

Solve the system by adding or subtracting x - 2y = - 13 5 x + 2y = -17

Mathematics

2 answers:

Delvig [45]3 years ago

5 0

You subtract and find x=10

vredina [299]3 years ago

5 0

Answer:

use the combination method

Step-by-step explanation:

x - 2y = -13

+ 5 x + 2y = -17

since 2y is in both equations you cancel them out.

5x + x = 6x

-2y + 2y = 0

-13 + (-17) = -30

put it back into the equation

6x + 0 = -30 or 6x = -30

6x ÷ 6 = x

-30 ÷ 6 = -5

x = -5

then plug into the equation x - 2y = -13 and 5x + 2y = -17

-5 - 2y = -13

-13 + 5 = -8

-2y = -8

y = 4

x = -5 and y = 4

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