Question

ACB = DCE
A = 3x-10, C = 45°, D = 2x+10
Please help confused

Answer 1

x = 20

Explanation:

The congruence statement tells you that angle A is congruent to angle D. (Both are listed first in the triangle names.) This means ...

∠A = ∠D

3x -10 = 2x +10

x = 20 . . . . . . . . . . add 10-2x to both sides