book Maths Puzzle Numerical Ability

Can you help me solve these three problems? Solve the linear equation by using the substitution method... 2x-y=2 and 4x+5y=5/3
Problem 2: Solve the linear equation using the addi

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Hi. I was wondering if you can list the steps of how to do this problem:

3|x-2|divided by 7 over 6 equals 36

Thanks Solve equation below using the quadratic formula.
1. x2+4x+3=0

Im hoping you can help me and you know the fomula

Thank You,

Sarah