9 734 - 2 . x = 168
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370 x 734 + 123 x 266 - 147 x 734
= 734 x (370 - 147) + 123 x 266
= 734 x 223 + 123 x 266
= 123 x (734 + 266) + 734 x 100
= 123 x 1000 + 734 x 100
= 123000 + 73400
= 196400
7794 - ( 873 - 734 ) + ( 1873 - 794 - 734 )
= 7794 - 873 + 734 + 1873 - 794 - 734
= ( 7794 - 794 ) + [ (-873) + 1873 ] + (734 - 734 )
= 7000 + 1000 + 0
= 8000.
\(a,C1:\left(524-168\right):4=356:4=89\\ C2:\left(524-168\right):4=524:4-168:4=131-42=89\)
\(b,C1:72:\left(9\times4\right)=72:36=2\\C2:72:\left(9\times4\right)=\left(72:9\right):4 =8:4=2\)
\(c,C1:\left(25\times72\right):9=1800:9=200\\ C2:\left(25\times72\right):9=25\times\left(72:9\right)=25\times8=200\)
a,C1:(524−168):4=356:4=89C2:(524−168):4=524:4−168:4=131−42=89a,C1:(524−168):4=356:4=89C2:(524−168):4=524:4−168:4=131−42=89
b,C1:72:(9×4)=72:36=2C2:72:(9×4)=(72:9):4=8:4=2b,C1:72:(9×4)=72:36=2C2:72:(9×4)=(72:9):4=8:4=2
c,C1:(25×72):9=1800:9=200C2:(25×72):9=25×(72:9)=25×8=200
\(9734-2.x=168\Rightarrow2x=9734-168\Rightarrow2x=9566\Rightarrow x=4783\)
9 734 - 2 . x = 168
2 . x = 9 734 - 168
2 . x = 9 566
x = 9 566 : 2
x = 4783