book Maths Puzzle Numerical Ability

5 + 2x
_______ = 14
8
Please help me work this problem

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book Other Question

3x + 4y = 24

Can you please help me solve this problem. I'm looking x intercept the y intercept and the slope and rise over run.
Thank you for your help,

Angel
NEED HELP WRITING EQUATIONS FOR WORD PROBLEMS AND SHOWING WORK

#1 WORD PROBLEM:

The sales tax on a book was $1.74. If the sales tax was 5%, What was the cost