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x = (y+12)/3

Lets begin by splitting the bx term to make factorising possible: 2x² - x - 21 is the same as 2x² - 1x - 21What two numbers = -1 when added, and = -42 when multiplied together?(note ...

1. x=5 2) x=2

Work out 2³⁴/(2³)¹⁰ (2³)¹⁰= 2³⁰ 2³⁴/2³⁰= 2⁴ = 16

First, draw a diagram to help visualise the problem.
Next, write out the full sum: x + x + (x+4) + (x+4) = 45
This simplifies to: 2x + 2(x+4) = 45
Which expands to: 2x + 2x + 8 =45
T...