1. <span>5а-(0.7а+8) = 5а - 0,7а - 8= 4,3а - 8</span>
<span>2. <span>9.6b+(7-0.4b) = 9,6в + 7 - 0,4в = 9,2в + 7</span></span>
<span><span>3. <span>-5c+(13-6c) = -5с + 13 - 6с = 13 - 11с</span></span></span>
<span><span><span>4. <span>5*(4-3x)+8x = 20 - 15х + 8х = 20 - 7х</span></span></span></span>
<span><span><span><span>5. <span>(2y+5)*4-11y = 8у + 20 - 11у = 20 - 3у</span></span></span></span></span>
<span><span><span><span><span>6. <span>6x-3*(x-7) = 6х - 3х + 21 = 3х + 21</span></span></span></span></span></span>
<span><span><span><span><span><span><span>6a+4b+3b-8a При а=1,и b=0.5</span></span></span></span></span></span></span>
<span><span><span><span><span><span><span>7в - 2а = 7 * 0,5 - 2 * 1 = 1,5</span></span></span></span></span></span></span>