exam Maths Puzzle Numerical Ability

Solve:
5[3(7-t)-4(8+2t)]-20 <= -6[2(6+3t)-4]

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exam Other Question

Write the equation fo the line that passes through point (0,4) with a slope of 8/7
and
Write the equation of the line with x-intercept (-4,0) and undefined slope 1. which is the largest set of ratios in the set: 4/5 over 1/3, 7/8 over 1/4, 7/9 over 1/6, 2/3 over 1/5, 9/11 over 1/4 2.which is the largest: 1 3/4 over2/3, 2 1/2 over3/4, 2 1/8