Solving word problems with equations. Chapter II review
Answers are for parents and teachers.
1
Four consecutive natural numbers have sum 50. Find the smallest.
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2
A square with side x has perimeter 60 cm. Write an equation and find x.
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3
Solve 5(x - 1) - 2(x + 2) = 3x - 9.
5x - 5 - 2x - 4 = 3x - 9 gives 3x - 9 = 3x - 9, so every value of x is a root.
4
Two cities are 330 km apart. A car at 60 km/h and a bus at 50 km/h leave them at the same time towards each other. After how many hours do they meet?
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5
Solve (x + 2) : 3 = 5.
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