book Maths Puzzle Numerical Ability

Could you help me solve these linear inequalities by grahing?

5x+8y=48 6-y=(5x)/(8)

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book Other Question

Simpliy: w to fourth power over w to second power a) w to 1/2 power b) w to eighth power c) w to sixth power d)w to second power 7a/15b-2b/5