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hjlf
3 years ago
14

Solve the system of equations using substitution or elimination: x = 3y + 6 2x - 4y = 8

Mathematics
1 answer:
dem82 [27]3 years ago
5 0

Answer:

x=0, y=-2

Step-by-step explanation:

Let x=3y+6 be equation 1

and 2x-4y=8 be equation 2

sub equation 1 into equation2,

2(3y+6)-4y=8

6y+12-4y=8

2y=-4

y=-2

sub y=-2 into equation 1,

x=3(-2)+6

x=0

sub is an abbreviation for substitute

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Answer:

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Step-by-step explanation:


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Now i'm going to multiply 8 by 11

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Now solve 4^2

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kolezko [41]
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3 years ago
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JulsSmile [24]

Answer:

20

Step-by-step explanation:

Our expression:

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Plus then minus (+ -) is the same as just minus ( - )

Some examples:

1 + (+ 1) = 2

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1 - (+ 1) = 0

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Thus, 18 + - 8 is the same as 18 - 8

2 * (18 + - 8) =

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