Решите уравнения : 9) 20+30к=20+к 16) - 9n+3=3(8n+45) - вопрос №6315838920302016933845228121226 от anyyy001 28.12.2020 23:23

Question

Алгебра: Решите уравнения : 9) 20+30к=20+к 16) - 9n+3=3(8n+45) 22) 8y+12=12+y 26) 18+16k=18+k 27) 5(x-6)-2=2(x-7)-6

anyyy001 · Answer

9) 20+30к=20+к30k - k = - 20 + 2029k = 0k = 016) - 9n+3=3(8n+45)-9n+3 = 24n + 135-9n - 24n = -3 +135-33n = 132n = - 4  22) 8y+12=12+y8y - y = -12+127y = 0y = 026) 18+16k=18+k16k - k = -18 +1815k = 0k = 0 27) 5(x-6)-2=2(x-7)-65x - 30 - 2 = 2x - 14 - 65x - 2x = 30 + 2 - 14 - 63x = 12x = 4...