Question

4X+3 2x+9 linear pairs of angles

Answer 1

x = 28°

Explanation:

• 4x+3 and 2x+9 are on a straight line, so the sum is 180°, we solve with an equation

4x + 3 + 2x + 9 = 180°

6x + 12 = 180

6x = 180 - 12

6x = 168

x = 168 : 6

x = 28°

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• check

4 × 28 + 3 + 2 × 28 + 9 = 180 (remember PEMDAS)

112 + 3 + 56 + 9 = 180

180 = 180