Answer:
(-1/2, 3/4)
Step-by-step explanation:
Let's use the elimination by adding or subtracting method. Note that we have 8y in the first equation, and that we could obtain -8y in the second equation by multiplying the second equation by 2:
2(24x - 4y = -15) => 48x - 8y = -30
Now combine this result (this equation) with the first equation:
2x + 8y = 5
+48x -8y = -30
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50x = - 25
Dividing both sides by 50, to isolate x, we get
x = -25/50 = -1/2.
Now substitute -1/2 for x in the first equation and solve the resulting equation for y:
2x + 8y = 5
2(-1/2) + 8y = 5, or -1 + 8y = 5, or 8y = 6 (after having added 1 to both sides)
Dividing both sides of 8y = 6 by 8 leads to determining the value of y:
y = 6/8 = 3/4
The solution is (-1/2, 3/4).
Answer:
5 wood
Step-by-step explanation:
(5x^3 + 3x^2 + 5x) + (7x^3 -3x^2 +8x) = (12x^3 + 13x)
(3x^3 + 5x^2 + 4x) + (9x^3 - 5x^2 + 9x) = (12x^3 + 13x)
Answer:
x = 12
Step-by-step explanation:
3x - 12 = 24
Add 12 to both sides
3x = 36
Divide 3 to both sides
x = 12
Best of Luck!