1 Answer

Morteza Malvandi · Answer 1 · 2018-10-27T08:43:17+0000

10
sum is add
cube is to the 3rd powr
19+x³

11.
product means multiply
3 times y is no more than (equal to or less than ) 21
3y≤21
no need to solve

12. 2 times difference is 10
difference is subtract

2(z-12)=10

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