exam Maths Puzzle Numerical Ability

IS THIS RIGHT? 10{7-4(7-5)}= 60, DOES IT EQUAL 60?

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exam Other Question

when the first of two numbers is added to twice the second number, the result is 21, but when the second number is added to twice the first the result is 18. find the two nummbers. A triangular tent is 5ft by 7 ft and 7ft at the peak. What is the surface area and volume?