The elevation of city A is 80 feet below sea level; the elevation of city C is 16 feet below sea level . The elevation of city D
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Ten (10) more than (+) half (
) of a number (x) is (=) eight (8) less than (-) twice (2 x ) the number (x).
x + 10 = 2x - 8 Multiply both sides by 2
x + 20 = 4x - 16 Subtract x from both sides
20 = 3x - 16 Add 16 to both sides
36 = 3x Divide both sides by 3
12 = x
x + 20 = 4x - 16 Subtract x from both sides
20 = 3x - 16 Add 16 to both sides
36 = 3x Divide both sides by 3
12 = x