exam Maths Puzzle Numerical Ability

0.0625a + 0b + 0c + 0d =0
-0.125a + 0.5b - 0.25c + 0d=5.625
0a - 0.25b + 0.55c - 0.1d =0
-0.25a + 0b -0.1c + 0.4d =-7.5

Read Solution (Total 0)

exam Other Question

graph 3x+2y=6

Thank you.
Can you please show a breakdown to this? So I understand how to do these types of algebra problems? Thanks 16-5(3t-4)=8(-2t+11)