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coolfreekid3
09.11.2019 •
Mathematics
8x+ 3y = 1
4x + 2y = 0
solve the system of equations using elimination (10 points)
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Ответ:
x = 1/2
and
y = -1
Step-by-step explanation:
8x + 3y = 1
4x + 2y = 0
Multiply 4x + 2y = 0 by 2
8x + 3y = 1
8x + 4y = 0
8x + 4y = 0 minus 8x + 3y = 1
y = -1
For 8x + 3y = 1 plug in y = -1
8x + 3(-1) = 1
8x - 3 x 1 = 1
8x - 3 = 1
Add 3 to both sides
8x - 3 + 3 = 1 + 3
8x = 4
Divide both sides by 8
8x/8 (cancels out) = 4/8
x = 1/2
Ответ:
aA F are the only ones yes
Step-by-step explanation: draw a vertical line if it touches more than once it's not a function