5 apples cost 10 dollars so how much would 7 apples cost?
so 5/10 is equal to 7/x
you use x because you don't know how much it will cost
so u cross multiply
5 ..... 7
__ = __
10 ..... x
5 times x is 5x 7 times 10 is 70 70 divided by 5 is 14 therefore 7 apples will cost $14.00 that's a proportion
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