Solve for x.

Mathematics

1 answer:

Doss [256]3 years ago

5 0

Answer:

x= 16

Step-by-step explanation:

First, you want to distribute each side! (you're gonna wanna learn this because you will be having to do it for the next 3 years no joke it sucks)

7(x+2) can be distributed as 7x+14 after multiplying 7 times x and 7 times 2, and 6(x+5) can be distributed as 6x+30.

Now, you have to get the x on one side to solve for x (so like x=__).

To do this, look at the equation as of now. 7x+14=6x+30.

We can minus 14 and bring that to the right, and minus 6x and bring that to the left to separate the x's and the regular numbers.

Now we have 16=x (or x=16).

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Given:3(x-4)=2x+7 prove: x=19 proof:

spayn [35]

3(19-4)=2(19)+7
distribute the 3
57-12=38+7
45=45

3 0

3 years ago

A teacher is four times as old as a student. In 28 years, the student's age will be half of the teacher's age. How old are they

swat32

Here, let the age of student be x and teacher be 4x after 28 years, the teacher is double the age of student. So the age of teacher will be 4x+28 and student will be 2(x+28)
So,
4x+28=2(x+28)
4x+28=2x+56
4x-2x=56-28
2x=28
x=14
Therefore the age of the teacher in present will be
=4x+28
=4*14+28
=84
And age of student will be:
=x+28
=14+28
=42
Hope this helps

7 0

3 years ago

ILL MARK BRAINLYEST

belka [17]

Step-by-step explanation:

Supplementary angles add up to 180 degrees

Complementary angles add up to 90 degrees

It is just a rule that is important to geometry

I hope that helps :)

4 0

3 years ago

Read 2 more answers