exam Maths Puzzle Numerical Ability

Hi, My question is from Chapter 10 Review Exercises 678
#94 Find all real or imaginary solutions to each equation.
49x^2 + 9=42x

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exam Other Question
Solve this inequality: x/4 < -5 Note there is a line under the greater than sign add fraction or integers together
16 - 3 . 7 + 5