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10-58.

Solve each equation below for $x$ . Check your solutions if possible.

$\frac { 4 } { 5 }x - 2 = 7$
Hint (a):
Combine like terms on one side of the equation.
More Help (a):
To eliminate a fraction, multiply both sides by its reciprocal.

$3x^2 = 300$
Hint (b):
With squared variables, there may be more than one answer.
Answer (b):
$x = -10$ or $x = 10$

$\frac { 4 x - 1 } { 2 } = \frac { x + 5 } { 3 }$
Hint (c):
See hints from part (a).
Answer (c):
$x = 1.3$

$x^2 - 4x + 6 = 0$
Hint (d):
Complete the square or use the quadratic formula.

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