Question

Hi guys i need help pleeasse

Answer 1

1

Explanation:

Triangles always equal 180° total.

Add 70 and 40

70 + 40

= 110

Set 71x - 1 and 110 equal to 180

71x-1 + 110 = 180

Combine like terms

71x + 109 = 180

Subtract 109 to both sides

71x + 109 -109 = 180 - 109

71x = 71

Divide by 71 to both sides

71x ÷71 = 71 ÷ 71

x = 1

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