помогите решить пожалуста
7x-40=4x+14
16x+72=12x+108
7x(3+k)=33+5k
1)7x - 40 = 4x + 147x- 4x = 14 + 403x = 54x = 182)16x + 72 = 12x + 1084x = 36x = 9 3)7(3+k)=33+5k21+7k=33+5k7k-5k=33-212k=12k=6
7x - 40 = 4x + 14 7x- 4x = 14 + 40 3x = 54 x = 18 16x + 72 = 12x + 108 4x = 36 x = 9 7(3+k)=33+5k 21+7k=33+5k 7k-5k=33-21 2k=12 k=6
1) 7х-40=4х+14 7х-4х=40+14 3х=54 х=54/3 х=18 2)16х+72=12х+108 16х-12х=-72+108 4х=36 х=36/4 х=9