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3 years ago

3x -5x + 8x = 4x + 18

Mathematics

2 answers:

BARSIC [14]3 years ago

8 0

Answer:

x = 9

Step-by-step explanation:

3x - 5x + 8x = 4x + 18

combine like terms on the left side and you get 6x = 4x + 18

then you subtract 4x from both sides

you get 2x = 18

divide each side by 2 and you get x = 9

spayn [35]3 years ago

6 0

First get any number with x on one side of the equation
3x - 5x + 8x - 4x = -18
Then evaluate
2x = -18
— —
2 2

X = 9

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Write the equation of a line that passes through (-3,-8) and (3, 10).

Xelga [282]

Answer:

y=3x+1

Step-by-step explanation:

The equation will most likely be in slope-intercept form which is

y=mx+b

(m) is the slope,

(b) is the y intercept

First we must find the slope. The formula for slope is (y1-y2)/(x1-x2)

Which means we take the (y) of the second given point and subtract the (y) if the first given point, then divide that by the (x) of the second given point minus the (x) of the first given point.

(10-(-8)/3-(-3)

18/6

Simplify

3/1

3, our slope is 3.

Now we can put this into our formula

y=3x+b

To find the y intercept we just apply one of the given points. (I'll use (3, 10) but either of them would work.

10=3(3)+b

Now solve

10=9+b

Subtract 9 from each side

1=b

Now we put our slope and y intercept into our formula

y=3x+1.

Hope this helps! If you have any questions on how I got my answer feel free to ask. Stay safe!

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