Q89: Solve<br>- <span class="ql-formula" data-value="2 x-5 \frac{1}{2}=3
Q90: Solve the equation<br>- <span class="ql-formula" data-value="3(5
Q91: Solve.<br>- <span class="ql-formula" data-value="2.8+\mathrm{x}=10"><span class="katex"><span class="katex-mathml"><math
Q92: Solve.<br>-To calculate the speed <span
Q93: Simplify.<br>- <span class="ql-formula" data-value="5 x+6 x"><span
Q95: Solve the equation.<br>- <span class="ql-formula" data-value="\frac{9}{4}
Q96: Solve.<br>- <span class="ql-formula" data-value="x+7=0"><span class="katex"><span class="katex-mathml"><math
Q97: Use an equation to solve the
Q98: Solve.<br>- <span class="ql-formula" data-value="-(3 y+8)=16-y"><span class="katex"><span
Q99: Solve the equation. Round the solution