17-09-2020
Mathematics

contestada

х+у= 20
3х – 3 = 30

Which of x and y satisfy this system of equations?

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jimrgrant1 jimrgrant1

17-09-2020

Answer:

x = 11, y = 9

Step-by-step explanation:

Given the 2 equations

x + y = 20 → (1)

3x - 3 = 30 → (2)

In (2) add 3 to both sides

3x = 33 ( divide both sides by 3 )

x = 11

Substitute x = 11 into (1)

11 + y = 20 ( subtract 11 from both sides )

y = 9

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