The correct option is A 80SOLUTION: 45100 x x + #160; 30100 x 90 #160; = #160; 30100 x 210 #160; 45100 x x ...

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Estimation Using Percentages in Situations

Question

45% of x + 30% of 90=30% 210. Then what is the value of x?

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Solution

The correct option is A 80
SOLUTION:
$\frac{45}{100}$ x $x$ + $\frac{30}{100}$ x $90$ = $\frac{30}{100}$ x $210$
$\frac{45}{100}$ x $x$ = 63-27=36
$x$ = 36 x $\frac{100}{45}$
$x$ = 80
hence the correct opt: A

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