5x3.14x4=3.14x100=314{|`5\r314x75% =235.53` 5\r3}1B?0.8x235.5=188.4~5\r *'
6 x*6000=1:500\r500x=6000xl\rx=6OOO+5OO\rx=12\r32-1Ba *'
12\r\ *'
x3.6:x=l:5OO\rx=3.6x500\rx=1800\r32-2Ba *'
1800\rH 1 2 I J 1 3 I.\r\ *8 9 *\rPuv \r600+15 = 40`/85;\rG)Puv:\r600+20 = 30 /85\r4uv8MG)*\r40- 30 = 10`5\r; < *\r33-u 600+15 - 600+20 = 10* \r34-1 B\rPy+Py= ry?- y??¡&|¢a + x = 50 - 23 , ::`£¤¥x , ¦¤¥7 , 1§¨Ea = 20 a + x\r= 50-23 , ©xª«7 , a20\r\:¬®¯x~ ?°±W²%1|¢*2x - 2 =4\r4\r2x=4 2\r4\rx=2 \r8\ra *¬³¯2 2 ~ .\r35-1B 8\rH 1 3 I J 1 3 I
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