Su has 3 times as many dolls as Bertha. When Su gives Bertha 4 dolls, they now have the same amount. How many dolls did they EAC
2 answers:
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The correct answer is: [C]: " 
" .
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Explanation:
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Given:
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2 / (9x) = 4 / 7 ; solve for "x" ;
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Cross-multiply:
→ (9x)*4 = 2 * 7 ;
→ 36x = 14 ;
Divide each side of the equation by "36" ;
to isolate "x" on one side of the equation; & to solve for "x" ;
→ 36x / 36 = 14 / 36 ;
x = 14/ 36 ;
→ x = 14/36 = (14÷2) / (36÷2) = 7/18 ;
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The answer is: "" ;
→ which is: Answer choice: [C]: "" .
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____________________________________________________
Explanation:
____________________________________________________
Given:
____________________________________________________
2 / (9x) = 4 / 7 ; solve for "x" ;
____________________________________________________
Cross-multiply:
→ (9x)*4 = 2 * 7 ;
→ 36x = 14 ;
Divide each side of the equation by "36" ;
to isolate "x" on one side of the equation; & to solve for "x" ;
→ 36x / 36 = 14 / 36 ;
x = 14/ 36 ;
→ x = 14/36 = (14÷2) / (36÷2) = 7/18 ;
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The answer is: "
→ which is: Answer choice: [C]: "
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