exam Maths Puzzle Numerical Ability

Find the slop and y-intercept and use them to graph the line
y = x - 1



y = 2/3x + 2



4y - 3 = -3x - 11

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add or substitute this problem I do not know how or which to do Can you help? 10x+2y=7 y=5x+3 I am not sure of this answer. I think the answer has one real solution. Am I correct?

x^2-3x+10=0

Does it have one real solution, two real solutions or two non-real solutions.