Question

х+320=80×7 x-180=240:3 400-x=275+25

Answer 1

х + 320 = 80 * 7

х + 320 = 560

х = 560 - 320

х = 240

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240 + 320 = 80 * 7

         560 = 560

х - 180 = 240 : 3

х - 180 = 80

х = 80 + 180

х = 260

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260 - 180 = 240 : 3

          80 = 80

400 - х = 275 + 25

400 - х = 300

х = 400 - 300

х = 100

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400 - 100 = 275 + 25

        300 = 300