Решите 2518:0,02 3016,2*12,4 4х+28=36 100-4*(х+2)=72 2 1/4+10 3/7 10 1/5-3 1/4 2 1/2*3 2/5 4 1/5:2

2518 : 0,02 = 125.9003016,2 * 12,4 = 37400,88 4х + 28 = 36  4х = 8 х = 2 100 – 4 * (х+2) = 72 х = 5 2 1/4 + 10 3/7 = [latex] \frac{63}{28} [/latex] + [latex] \frac{292}{28} [/latex] =  = [latex] \frac{355}{28} [/latex] = 12 [latex] \frac{19}{28} [/latex] 10 1/5 - 3 1/4 = [latex] \frac{51}{5} [/latex] – [latex] \frac{13}{4} [/latex] =  = [latex] \frac{204}{20} [/latex] – [latex] \frac{65}{20} [/latex] = = [latex] \frac{139}{20} [/latex] = 6 [latex] \frac{19}{20} [/latex] 2 1/2 * 3 2/5 = [latex] \frac{5}{2} [/latex] * [latex] \frac{17}{5} [/latex] =  = [latex] \frac{25}{10} [/latex] * [latex] \frac{34}{10} [/latex] = [latex] \frac{850}{10} [/latex] = 85 4 1/5 : 2 = 4,2 ÷ 2 = 2,1