exam Maths Puzzle Numerical Ability

hey you guys are great for doing this!!
please if you can help me.

Solve the equation :
3/7x + 5= 8


the / means a fraction.

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exam Other Question

the variables x and y vary directly.use the given values to write an equation that relates x and y

x=5,y=40

i have no clue how to do it
1) M bisects RS. R has coordinates (-2,-3), and M has coordinates (1,0). Find the coordinates of S.

2) AB has endpoints A(-6,-4) and B (-1,8). CD has endpoints C(2,5) and D(14,0