Ответ:

Пошаговое объяснение:

(x + 340) - 152 = 214

x + 340 = 214 + 152

x + 340 = 366

x = 366 - 340

x = 26

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500 + (x + 140) = 2056

x + 140 = 2056 - 500

x + 140 = 1556

x = 1556 - 140

x = 1416

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800 : y - 300 = 500

800 : y = 500+300

800 : y = 800

y = 800 : 800

y = 1

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(a + 200) : 400 = 2

a + 200 = 2*400

a + 200 = 800

a = 800 - 200

a = 600