exam Maths Puzzle Numerical Ability

For the systems of linear equations in questions 1-3
- Determine how many solutions exist
- Use either elimination or substitution to find the solutions (if any)
- Graph the two

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exam Other Question
We are in need of help. Need to come up with a word problem to solve the formula y=30x+8. This is for a project to graph and make a table.

Thanks, if you can help. Solve for x

x^2+4x+4=7

Thanks in advance.