3 years ago

Solve: 2x+4y=20 and 2x-y=4

Mathematics

2 answers:

Masteriza [31]3 years ago

5 0

Answer:

X=3.6

Y=3.2

Step-by-step explanation:

2x-y=4 which means 2x=4+y
2x+4y = 20 which means 4+y+4y=20 ==> 4+5y=20
5y = 20-4 = 16
y= 16/5 = 3.2
2x=4+y=4+3.2=7.2
x = 7.2/2 = 3.6

fgiga [73]3 years ago

4 0

Answer:
(x, y) = (18/5, 16/5)
OR
(x, y) = (3.6, 3.2)

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