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Tamiku [17]
3 years ago
7

Can some one help me 2x+y=4 Y=2/3x-4

Mathematics
1 answer:
Sedbober [7]3 years ago
5 0
So you subsitute y=2/3x-4 for y in 2x+y=4 so
2x+(2/3x-4)=4
2x+2/3x-4=4
add like terms
2 and 2/3x-4=4
add 4 to both sidees
2 and 2/3x=8
   2 and 2/3=6/3+2/3=8/3
8/3x=8
multiply both sides by 3/8 (makes 8/3=24/24=1/1=1)
x=(3*8)/8
simplify
x=3
subtitute x=3 into y=2/3x-4
y=2/3(3)-4
y=(6/3)-4
y=2-4
y=-2
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Step-by-step explanation:

<u><em>Method 1</em></u><u><em>:</em></u>

100% - 65% = 35%

\frac{y}{140}: \frac{35}{100}

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100y ÷ 100 = 4900 ÷ 100

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<u><em>Method 2</em></u><u><em>:</em></u>

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