exam Maths Puzzle Numerical Ability

Solve the following system of equations

x+2y-6=z
3y-2z=7
4+3x=2y-5z

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exam Other Question

Please help me to sketch the following line by method of Linear Function or straight lines.
7. y = (2/3)x-4
8. 8x-3y=24
9. slope=-3/4

Thanks, I am grateful for your help. Kelly has a purse full of quaters and dimes. There are 58 more quaters than dimes and the total value of the change is $19.50. How many dimes are there?