Пошаговое объяснение:

88х-53х+4х=78

39х=78

х=2

55у-33у+3у=75

25у=75

y=3

Verified answer

а)

[tex]88x - 53x + 4x = 78 \\ 35x + 4x = 78 \\ 39x = 78 \\ x = 78 \div 39 \\ x = 2[/tex]

б)

[tex]55y - 33y + 3y = 75 \\ 22y + 3y = 75 \\ 25y = 75 \\ y = 75 \div 25 \\ y = 3[/tex]