(490 - х) - 250 = 70(1604 - х) - 108 = 800(456 + 112) - х = 400(х + 54) - 28 = 382 × (300...

Question

(490 - х) - 250 = 70
(1604 - х) - 108 = 800
(456 + 112) - х = 400
(х + 54) - 28 = 38
2 × (300 + х) = 600
(х + 200) : 400 = 2

Answer 1

(490-х)-250=70
490-х=320
-х=-170
х=170

(1604-х)-108=800
1604-х=908
-х=-696
х=696

(456+112)-х=400
568-х=400
-х=-168
х=168

(х+54)-28=38
х+54=66
х=12

2×(300+х)=600
300+х=300
х=0

(х+200):400=2
х+200=800
х=600

Comments

спасибо

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а последний

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а нет