(04.01)Solve the following system of equations by substitution and select the correct answer below:4x − 6y = 28 8x − 4y = 24
1 answer:
It is convenient to divide the second equation by 2, then substitute for 4x in the first equation.
4x -2y = 12
4x = 12 + 2y . . . . solve for 4x
(12 +2y) -6y = 28 . . . . substitute for 4x
-4y = 16 . . . . . . . . . . . . subtract 12
y = -4 . . . . . . . . . . . . . .divide by -4
4x = 12 + 2(-4) = 4
x = 1
The solution is (x, y) = (1, -4).
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Sum means add
(x+5) + (-4x-2) + (2x-1)
=-3x+3+(2x-1)
=-x+2
Answer:
24
Step-by-step explanation:
30 + (-6) is equivalent to 30 -6, which is 24.
Answer:
576
Step-by-step explanation:
3*2 = 9
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