book Maths Puzzle Numerical Ability

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5x+t=17
7x-k=8
4-2x=g
15+3x=u
a+6x=c
b-7x=n
ax-b=k
hx+j=r
2x=4a+2b

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book Other Question

If the larger of two numbers is 5 morn than the smaller. The smaller number plus twice the larger equals 100 the height h, of a ball above ground t seconds after it is thrown vertically upwards can be approximated by the formula h=vt-5t squared, where v is the intial speed with which the