3 years ago

2x-y=8x+2y=4for the system of equation above, what is the value of x+y?

Mathematics

2 answers:

schepotkina [342]3 years ago

5 0

Answer:

Step-by-step explanation:

2x-y=8 ---> y= 8-2x

substitute y=8-2x into x+2y=4

x + 2(8 - 2x) = 4

x + 16 - 4x = 4

-3x = -12

x = -12/-3

x = 4

substitute x=y into y=8-2x

y = 8 - 2(4)

y = 8 - 8

y = 0

therefore,

x+y= 4+0

btw i like ur jimin pfp besty :)

inysia [295]3 years ago

3 0

2x+10y I thinks that’s the answer mb

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natta225 [31]

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3 years ago

Factor the expression 45b+40

natali 33 [55]

Answer:

5(9b + 8)

Step-by-step explanation:

Rewrite 45 as 5 * 9

Rewrite 40 as 5 * 8

= 5 * 9b + 5 * 8

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=5 (9b + 8)