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Sagot :
-5x + y = -3....A
3x - 8y = 24...B
Solve A for y.
-5x + y = -3
y = 5x - 3
Plug into B to solve for x
3x - 8(5x-3) = 24
3x -40x + 24 = 24
-37x = 24 - 24
-37x = 0
x = 0/-37
x = 0
Now that we know x, plug the value of x into A or B (your choice) to find y.
I will use B.
3x - 8y = 24
3(0) - 8y = 24
0 - 8y = 24
-8y = 24
y = 24/-8
y = -3
Answer: x = 0, y = -3
Answer:
x = 0 , y = -3
Steps:
given:
-5x + y = -3
3x - 8y = 24
1st method
3x - 8y = 24
8y = 3x - 24
y = (3x - 24)/8
-5x + y = -3
-5x + (3x - 24)/8 = -3
(-40x + 3x - 24)/8 = -3
(-37x - 24)/8 = -3
(-37x - 24) = -3 × 8
-37x - 24 = -24
-37x = 24 - 24
-37x = 0
x = 0
2nd method
y - 5x = -3
y = 5x-3
3x - 8y = 24
3x - 8(5x-3) = 24
3x - 40x + 24 = 24
3x + 40x = 24 - 24
43x = 0
x = 0
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