How to solve the equation for y, given y+7x=9 then find the value for each value of x: -1, 0, 4?

Mignolij6s

Mignolij6s

Answered question

2022-12-27

How to solve the equation for y, given y+7x=9 then find the value for each value of x: -1, 0, 4?

Answer & Explanation

bagosiwp2

bagosiwp2

Beginner2022-12-28Added 16 answers

y+7x=9
This equation has two variables, so you can't solve it and come up with a single, special solution. There are infinitely many solutions.
""Solve for y"" means write the equation as y=.
y+7x7x=97x subtract 7x from each side
y=7x+9 equation of a straight line
Now you have been given various values of x. Use each in turn in the equation and find the corresponding values of y
y=7x+9
x=1y=7(1)+9
×××.××xy=+7+9=16
x=0y=7(0)+9
×××..××y=0+9=9
x=4y=7(4)+9
×××××y=28+9=19
What you have actually found is three points, (x,y) on a line.
(1,16)(0.9)(4,19)

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