70°.,.,.,.,.,.,.,.,..,.,.,.
<span>п </span><span>+ </span><span>9 </span><span>- </span><span>9 </span><span>= п</span>
<span>R </span><span>- </span><span>7 </span><span>+ </span><span>7= R</span>
<span>a </span><span>+ </span><span>9 </span><span>- </span><span>9 </span><span>= a</span>
1) x = 24 * 19
x = 456
2) x = 252:14
x = 18
3) x+8 = 12 * 9
x + 8 = 108
x = 108 - 8
x = 100