6877-х=200+982 а+354=412+48 29400÷х=700×21 419+х=209×4

6877-х=2000+984
-х=2984-6877 (-1)
х==6877-2984
х=3893
а+354=412+48.
а+354=460
а=460-354
а=106
29400÷×=700×21
29400:х=14700
х=29400:14700
х=2

419+×=209×4
419+х=836
х=836-419
х=417

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