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3 years ago

Solve using substitution x=y+3. 2x-y=5

1 answer:

7 0

X = y + 3
2x - y = 5

substitute the first equation into the second equation;
2x - y = 5
2(y + 3) - y = 5
2y + 6 - y = 5
y + 6 = 5

solve for y;
y + 6 = 5
y = 5 - 6
y = -1

solve for x;
x = y + 3
x = -1 + 3
x = 2

x = 2, y = -1

hope this helped, God bless!

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3 years ago

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3 years ago

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----------------------------------------------------

Our equation would be

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We cross multiply to get 8x(10x-2) = 7x(5x+3)

Instead of solving and getting squares, we can x on both sides and we get:

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3 years ago