0nineviz
Answered

The difference between four times a number and eleven equals the sum of the number and thirteen. Find the number.


A. 8

B. 5

C. 4

D. 3


Anna weighs 4 kg more than her sister Elsa. Their total weight is 108 kg. What is the weight of Anna?


A. 48 kg

B. 52 kg

C. 56 kg

D.104 kg

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MariHani99viz

A. 8

[tex]4x - 11 = x + 13 \\ 4x - x = 13 + 11 \\ 3x = 24 \\ \frac{3x}{3} = \frac{24}{3} \\ x = 8[/tex]

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B. 52

[tex](x + 4) + x= 108 \\ 2x + 4 = 108 \\ 2x = 108 - 4 \\ \frac{2x}{2} = \frac{104}{2} \\ x = 52[/tex]

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