2x-y=-1 3x-y=2 in simultaneous equations

Let's solve for x.

2x−y=−13x−y

Step 1: Add 13x to both sides.

2x−y+13x=−13x−y+13x

15x−y=−y

Step 2: Add y to both sides.

15x−y+y=−y+y

15x=0

Step 3: Divide both sides by 15.

15x

15

=

0

15

x=0

x=0

Step-by-step explanation:

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part a

x     y

0     8

1     7.5

2     7

3     6.5

4     6

5     5.5  

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part b

it is a function because for every x value there is only one y value

part   c

for every x value there is only one y value

x       y

0       8

1       7.6

2       7.2

3       6.8

step-by-step explanation:

answer: 414,377,008

step-by-step explanation:

just multiply it