How to find the value of x in an equation


Asked by wiki @ in Mathematics viewed by 252 People


Enter and solve an equation to find the value of x for the triangle. (hint: The sum of the angle measures in any triangle is 180°.)

Answered by wiki @



The value of x is 35°.

Sum of angles in a triangle = 180°

Therefore, we will add to the values of the three angles together to get the value of x. This will be:

60° + 60° + (4x - 80°) = 180°

120° + 4x - 80° = 180°

Collect like terms

4x = 180° - 120° + 80°

4x = 140°

Divide both side by 4

4x/4 = 140°/4

x = 35°

In conclusion, the value of x is 35°.

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