exam Maths Puzzle Numerical Ability

Please help!

The problem is:

Solve the system by using the substitute method. Determine whether the equations are independent, dependent or inconsistent.

Eq 1 states: 3x + 5y = 25
Eq 2 states: x -2y = -10

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exam Other Question

If Saliu can paint a house in 8 hours, and Yemi can paint the same house in 16 hour,Bobo can paint the same house in 5 hours, how long will it take for all of them to paint the house together? 6x+2y=-10
2x+2y=-10