exam Maths Puzzle Numerical Ability

log2 (base of 2) of x + 5 (no parentheses) = 8 - log2 (base of 2) of (x+7)

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exam Other Question

Find the intercepts and then use them to graph the equation.

1.9x - 1.1y = 4.18
Please help! How do I solve the following equations?

(a) -x+12=-4+x

(b) 3(x-2)+2=2(x-4)

(c) x/5 - x/3 = 8/15

(d) I = Prt Solve for r