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Find the solution to the system by addition (elimination) method.
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Q12: 1.5x + 4.3 = 0.7x + 2.54<br>A)x
Q15: The polynomial 0.8x - 55 models the
Q23: <span class="ql-formula" data-value="\begin{array} { l } 5
Q30: <span class="ql-formula" data-value="y = - 2.5 x
Q55: 5x + 54y = 54 3x -
Q60: <span class="ql-formula" data-value="\sqrt { \frac { 121
Q75: If <span class="ql-formula" data-value="r (
Q84: <span class="ql-formula" data-value="4 x+2=-22"><span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mn>4</mn><mi>x</mi><mo>+</mo><mn>2</mn><mo>=</mo><mo>−</mo><mn>22</mn></mrow><annotation
Q94: <span class="ql-formula" data-value="- 2 x - 11
Q133: 4x + x = 45 <br>A)