Question

find the solution to the system of equations
21x+7y=42
-5x+5y=10

x=
y=

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

21x+7y=42

21x+7y=42-5x+5y=10

21x+7y=42 × 5

-5x+5y=10 × 21

105x+35y=210

-105x+105y=210

140y = 420

y = 420 / 140

y = 3

Put y = 3 in equation 2

-5x + 5(3). = 10

-5x + 15 = 10

-5x = 10 - 15

-5x = -5

x = 1

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