exam Maths Puzzle Numerical Ability

Hello out there,I need some help with some tough problems,the first one is,State whether the system is consistent and independent,consistent and dependent,or inconsistent.4x+2y=8 a

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exam Other Question

If Joe & Jane have a total of 40 coins consisting of nickels & dimes totaling $3.00. How many nickels & dimes do they have.
Describe the system 6x-2y=10 and 9x-3y=8 as consistant andindepentent, consistent and dependent, or inconsistent.

I get consistent and dependent, but I'm not sure.