<span>a.5a+4a=</span><span>b.2x+3x+10=</span><span>в.1.5+а+2.5а=</span><span>г.6у+8+6у=</span><span>д.7m+ m=</span><span>e.3/8n+ 5/8n+1\3n</span><span>--------------------------------</span><span>18x-3x+5x=</span><span>2y-9y=</span><span>1.2c-0.3c+5=</span><span>2a-15-a+6=</span><span>t+6.3t-2.1t=</span><span>5x-5+3x-4x</span><span>-a-a-a-a=</span><span>-2n-2n-2n</span><span>1/3x+1/3x+1/3x-</span><span>Упростить.</span><span>Помогите пожалуйсто:** </span>
<span>a.5a+4a=</span>9a<span>b.2x+3x+10=5x+10</span><span>в.1.5+а+2.5а=1.5+3.5a</span><span>г.6у+8+6у=</span>12y+8<span>д.7m+ m=8m</span><span>e.3/8n+ 5/8n+1\3n=1(целая)1\3n</span>
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<span><span>18x-3x+5x=20x</span><span>2y-9y=-7y</span><span>1.2c-0.3c+5=</span>0.9c+5<span>2a-15-a+6=a-9</span><span>t+6.3t-2.1t=5.2t</span><span>5x-5+3x-4x=4x-5</span><span>-a-a-a-a=-4a</span><span>-2n-2n-2n=-6n</span><span>1/3x+1/3x+1/3x=x</span></span>
Ответ:
12 000 (рублей) - стоил смартфон до понижения цены.