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Cesar Haas
Mathematics
17 September, 07:27
3x - y = 2 x + 2y = 3
+3
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1
)
Mira Cardenas
17 September, 07:40
0
3x - y = 2; x + 2y = 3
Solve 3x - y = 2 for y:
Add - 3x to both sides
3x - y + - 3x = 2 + - 3x
-y = - 3x + 2
Divide both sides by - 1
-y - 1 = - 3x + 2 - 1
y = 3x - 2
Substitute 3x - 2 for y in x + 2y = 3:
x + 2y = 3
x + 2 (3x - 2) = 3
Simplify both sides of the equation
7x - 4 = 3
Add 4 to both sides
7x - 4 + 4 = 3 + 4
7x = 7
Divide both sides by 7
7x / 7 = 7/7
x = 1
Substitute 1 for x in y = 3x - 2:
y = 3x - 2
y = (3) (1) - 2
Simplify both sides of the equation
y = 1
Answer:
x = 1 and y = 1
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