Question

Need help with this

Answer 1

<XMN = 122°

Explanation:

An angle around a point is 360°

If LMN = 145° then the rest would be 360 - 145

360 - 145 = 215

4x + 5 + 6x - 10 = 215

Simplify = 10x - 5 = 215

work out = 215 + 5 = 220 ÷ 10 = 22

x = 22

XMN = 6x - 10

6 × 22 = 132

132 - 10 = 122

XMN = 122