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3 years ago

What is the answer?

Mathematics

1 answer:

charle [14.2K]3 years ago

5 0

Answer:

x = 20 but see below.

Step-by-step explanation:

Remark.

This is not well enough marked to know whether D = A or whether you have to do some algebra to find the relationship between A and D. So I will assume A = D and then I'll solve it so you have to manipulate A and D.

A = D

3x - 10 = 2x + 10 Add 10 to both sides

3x - 10 + 10 = 2x + 10 + 10 Cancel

3x = 2x + 20 Subtract 2x from both sides

3x-2x=2x-2x + 20

x = 20

A = E

If A = E then to find x you have to add 3 angles together.

E + D + 45 = 180 Add the three angles of the triangle

E + D = 180 - 45 Subtract 45 from both sides

E + D = 135 Substitute for D and E

3x - 10 + 2x + 10 = 135 Combine like terms

5x = 135 Divide by 5

x = 135 / 5

x = 27

Answer

I'd go with the first one.

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