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3 years ago

6x - 5y = 11 y = 7x + 21 What is the correct answer to this problem?

Mathematics

1 answer:

evablogger [386]3 years ago

3 0

Answer:

X=-4, y=-7

Step-by-step explanation:

6x-5y=11. 1st equation

y=7x+21 2nd equation

6x-5(7x+21)=11. Sub value of y in 2nd equation (7x+22) into 1st equation

6x-35x-105=11. Solve by distributative property

-29x-105=11. Add x values

-29x=116. add 105 to both sides

x=-4. Solve for x

solve for y:

y=7x+21

y=7(-4)+21

y=-28+21

y=-7

check answer by substituting x and y into either equation

6x-5y=11

6(-4)-5(-7)=11

-24+35=11

11=11

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