Algebra 1 help give me the answer

Question

6) A truck is carrying 1500 pounds of cargo that occupies 138 cubic feet of space. A television weighs 50 pounds and occupies a space of 4 cubic feet. A microwave oven weighs 30 pounds and occupies a space of 3 cubic feet. Which system of equations can be used to find the total number of televisions , t, and microwaves , m, in the truck?

Answer 1

The total weight of the televisions and microwaves can be represented by 50t + 30m = 1500.

The total volume can be represented as 4t + 3m = 138.

The number of each can be obtained by solving the two equations simultaneously.

by substitution: Solve the second equation for t to get t = (138 -3m) / 4. Substitute this t into the first equation.

50 ( (138 -3m) / 4) +30m = 1500. Solve for m and then substitute that value into either equation and solve for t.

Answer 2

50t + 30m = 1500

4t + 3m = 138