# need help on a math problem singapore 5A

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pg 27 2nd problem

Lily and Sara each had an equal amount of money at first. After Lily spent \$18 and Sara spend \$25, Lily had twice as much as Sara. How much money did each have at first?

So, I'm feeling pretty ridiculous, but none of us can figure out how to do this problem. And doubly silly, because I'm sure we did it when my older daughter went through this book, but I don't remember it. :001_huh:

Someone put me out of my misery:D

Jen

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1. After they spent their money, Sara has \$7 more than Lily( \$25-\$18=\$7 )

2. Lilyâ€™s money was twice as much as Sara, that means Sara had \$7 at the end, and Lily had \$7+\$7=\$14 or 2x\$7=\$14

3. Lily and Sara had \$32 at first (\$14+\$18=\$32 or \$7+\$25-\$32)

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pg 27 2nd problem

Lily and Sara each had an equal amount of money at first. After Lily spent \$18 and Sara spend \$25, Lily had twice as much as Sara. How much money did each have at first?

So, I'm feeling pretty ridiculous, but none of us can figure out how to do this problem. And doubly silly, because I'm sure we did it when my older daughter went through this book, but I don't remember it. :001_huh:

Someone put me out of my misery:D

Jen

imagine bars the same length!

L [________|________][___18____] spent 18

S [______ _|_ 7_____][___18____] spent 25 (7 more than Lily)

Now ration is 2:1. Since the only difference is 7, then 7 equals one unit.

Lily has 14 and Sarah has 7 after spending their money. They began with \$32.

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Thank you! We kept trying the bars and just not figuring out how to set them up. You never feel so stupid as when you cannot do a simple child's math problem!!

Jen

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