Х-56×2=850 748+205+х=2000 х+89×3=748 2×х+1457=10267
Х-56×2=850 х-112=850 х=850+112 х=962 748+205+х=2000 953+х=2000 х=2000-953 х=1047 х+89×3=748 х+267=748 х=748-267 х=481 2×х+1457=10267 2х=10267-1457 2х=8810 х=4405