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kykrilka [37]
3 years ago
7

Solve the equation. 3(x−9)=30

Mathematics
2 answers:
maria [59]3 years ago
8 0

Answer:

x = 19

Step-by-step explanation:

First, we must distribute 3(x-9) = 30

3x - 27 = 30

Now, that we've distributed this equation, we can proceed.

Secondly, since there is a subtraction sign in front of 27, we must do the opposite, addition.

Add 27 to 27 and 30:

3x - 27 = 30

-27 + 27 = 0

30 +  27 = 57

Furthermore, -27 + 27 is 0, so it cancels itself out. Also, since we added 30 and 27 and got 57, replace 30 with 57.

3x = 57

Lastly, divide 57 by the number in front of coefficient, 3.

57/3=19

Therefore, x=19.

**TO MAKE THIS MORE UNDERSTANDING, THIS IS HOW YOUR EQUATION SHOULD LOOK WHILE SOLVING**

a_sh-v [17]3 years ago
3 0

Answer:

x = 19

Step-by-step explanation:

3(x - 9) = 30

Divide both sides by 3 to isolate the binomial.

x - 9 = 10

Add 9 to both sides to isolate x.

x = 19

Check your answer by plugging x = 19 back into the equation.

3(x - 9) = 30

3(19 - 9) = 30

Subtract.

3(10) = 30

Multiply.

30 = 30

Your answer is correct.

Hope this helps!

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saul85 [17]

Answer:

Step-by-step explanation:

I know this is not your question but it may help

Question:Write an equation in Slope intercept form of the line that passes through the given  points (-3,4) (1,4)

2 Answers:

1: y=x+4

2:

answer would be “y=4”

to find the answer: first you have to find the slope with the given points. (y2 - y1 / x2 - x1)

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if the y intercepts are the same then it usually indicates that the slope would be 0 and that the answer is the y intercept.. but if you don’t understand how to get slope-intercept using other coordinates then here’s how:

you can use point-slope formula (y-y1 = m (x-x1) in order to do this just plug in one of the coordinates. in this case an example of point-slope form would be:

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it doesn’t matter which coordinates you use..

then solve the point slope for slope-intercept.

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y-4 = 0x move -4 to the right by adding 4

y = 0x + 4 or y = 4 would be your answer!

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