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Write the following as an equation, using x for the unknown number. Then solve.
-If 3 times a number is added to -9, the result is equal to 12 times the number. Find the number.
Q51: <span class="ql-formula" data-value="y-2=0"><span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>y</mi><mo>−</mo><mn>2</mn><mo>=</mo><mn>0</mn></mrow><annotation encoding="application/x-tex">y-2=0</annotation></semantics></math></span><span
Q79: The distance, in feet, that a
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Q110: <span class="ql-formula" data-value="(2,-1)"><span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mo stretchy="false">(</mo><mn>2</mn><mo
Q143: <span class="ql-formula" data-value="y = - x ^
Q146: Slope <span class="ql-formula" data-value="\frac {
Q158: <span class="ql-formula" data-value="x \geq - 3"><span class="katex"><span
Q263: -6(2x - 7) - 4x + 6<br>A)
Q291: The population of a town is currently
Q310: <span class="ql-formula" data-value="y = 4"><span class="katex"><span class="katex-mathml"><math