Question

What equation can be used to determine x in the system of linear equations below ?

Answer 1

Answer: Option (A) for the speed runners

| 148 14 246 5 | / | -2 14 3 5 | = 52

Explanation:

substitute

-2x+14y=148

x=82-5/3y

solve

-2(82-5/3y)+14y=148

y=18

substitute for y

x=82-5/3 times 18

x=52 or 18