4x-7=2x+15 7x+12=10x-3 11-х=55+x -35-2x=42+9x - вопрос №4724392472157121031155352429 от eksergeeva5 22.03.2020 04:25

Question

Математика: 4x-7=2x+15 7x+12=10x-3 11-х=55+x -35-2x=42+9x

eksergeeva5 · Answer

1) 4x - 7 = 2x + 154x - 2x = 15 + 72x = 22x = 11 2) 7x + 12 = 10x - 37x - 10x = -3 - 12-3x = -15 x = 53) 11 - x = 55 + x -x - x = 55 - 11-2x = 44x = -224) -35 - 2x = 42 + 9x-2x - 9x = 42 + 35- 11x = 77x = -7...