Expressions with variable

This is algebra. Let n represent an unknown number and write the following expressions:

1. 4 times the sum of 7 and the number x
2. 4 times 7 plus the number x
3. 7 less than the product of 4 and the number x
4. 7 times the quantity 4 more than the number x
5. 4 times the quantity 7 less than the number x

Result

a = (Correct answer is: 4(7+x)) Wrong answer
b = (Correct answer is: 4*7+x) Wrong answer
c = (Correct answer is: 4*x-7) Wrong answer
d = (Correct answer is: 7(4+x)) Wrong answer
e = (Correct answer is: 4(x-7)) Wrong answer

Solution:

a=4(7+x)
b=4 7+x
c=4 x7
d=7(4+x)
e=4(x7)



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