If 4x+8y=12 then 4x-8y= ?
Answers
Answered by
3
Answer:
the answer is 12........
Answered by
0
Answer:
-92/7= qpprox. -13
Step-by-step explanation:
4x+8y=12
4(x+2y)=12
x+2y=3
2y=3-x >y=3-x/2 substitute on first equation
4x+(3-x) /2
(8x+3-x)/2
7x+3=2
7x=-1
x=-1/7
4*(-1/7)+8y=12
-4/7+8y=12
8y=12+4/7
8y=(84+4)/7
8y=88/7
y=88/7*8
y=11/7
4x-8y=?
4(-1/7)-8(11/7)
-4/7-88/7
(-4-88)/7
-92/7
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