Instructions

What value will come in place of the question mark (?) in the following questions.

Question 128

$$1478.4 \div 56 + 66.8 \times 57$$ = $$(? \times 3) + (34 \times 34.5)$$

Solution

Expression : $$1478.4 \div 56 + 66.8 \times 57$$ = $$(? \times 3) + (34 \times 34.5)$$

=> $$(\frac{1478.4}{56}) + (66.8 \times 57)$$ = $$(x \times 3) + (34 \times 34.5)$$

=> $$26.4 + 3807.6 = 3x + 1173$$

=> $$3834 = 3x + 1173$$

=> $$3x = 3834 - 1173 = 2661$$

=> $$x = \frac{2661}{3} = 887$$

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