book Maths Puzzle Numerical Ability

Solve The simultaneous equations to determine the value of y and Z:

4y = 5z - 47 = 0
y + 3Z = 17

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book Other Question

here is an equilateral triangle inside a square.The perimeter of the triangle is 48 centimeters.What is the perimeter of the square? write an equation in slope intercept form of the line with each slope and y-intercept.

m=0,b=4