с*5 = 65* 2
с*5 =130
с=130/5
с=26
X • 12 = 100 - 28
X • 12 = 72
х=72/12
х=6
78/a=13×3
78\а=39
а=78:39
а=2
450 + у = 158 · 4
450 + у = 632
у=632 - 450
у=182
67 + a = 79.8
67 + a =632
а=632-67
а=565
600 + y = 219.4
600+у=876
у=876-600
у=276
52 : x = 48:12
52/х=4
х=52/4
х=13
х+ 230 = 450 + 210 + 70
х+230=730
х=730-230
х=730
с*5 = 65* 2
с*5 =130
с=130/5
с=26
X • 12 = 100 - 28
X • 12 = 72
х=72/12
х=6
78/a=13×3
78\а=39
а=78:39
а=2
450 + у = 158 · 4
450 + у = 632
у=632 - 450
у=182
67 + a = 79.8
67 + a =632
а=632-67
а=565
600 + y = 219.4
600+у=876
у=876-600
у=276
52 : x = 48:12
52/х=4
х=52/4
х=13
х+ 230 = 450 + 210 + 70
х+230=730
х=730-230
х=730