exam Maths Puzzle Numerical Ability

Please help me solve these problems.
Solve 6x-0.37=5(x-0.28)
Solve the syslem by substitution.
2x+2y=0
y=4x+0
Solve by addition 5x-4y=-5
x=2y=-7
Please help me solve these problems
Thank you
MM

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exam Other Question

what is the domain of f(x)= 2x+3 and what is the domian of g(x)= x-1? Determine which two equations represent parallel lines. Justify the answer.
(a) y = (5/7) x + 3
(b) y =(7/5) x + 5
(c) y = (7/5) x - 5
(d) y = -(5/7) x + 5