Q111 of 113 Page 110

For what value of x is perimeter of shape 186 cm?

Perimeter = 2a + 2b

186 = 2(5x + 6) + 2(2x + 66)


186 = 10x + 12 + 4x + 132


186 = 14x + 144


186-144 = 14x


42 = 14x


x = 3 cm


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