exam Maths Puzzle Numerical Ability

Tutor could you help me please. Determine the slope, if it exists of the graph of the given linear equation.

3x-4y=-11
The second problem is y=3/4

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exam Other Question

Hi, I need help on getting this answer - Three times the larger of 2 numbers increased by 4 times the smaller is 205. Six times the larger plus 3 times the smaller is 270. Find the numbers.
Thank you There are 132 more silver dollars than 50-cent pieces.
The ratio of the silver dollars to 50-cent pieces is 5:2.
So how many of each coin are there?