Solve the system of equation. Check your answer.

0.25x -6 = 17  add 6 to both sides

0,25 x  = 23      divide both sides by 0.25

x = 92

Substitute this vakue into the second equation  for x

0.07 (92) + 0.4y = -2  simplify

6.44 + 0.4y   = -2      subtract 6.44 from both sides

0.4 y   = -8.44    divide both sides by 0.4

y = -21.1

I'll leave the check for you......