Найти корень уравнения 3(17-22.1x) = -7-63.4x
3(17-22.1x) = -7-63.4x 51-66.3х=7-63.4х -66.3х +63.4х=-7-51 -2.9х=58 Х=20
51-66.3x=-7-63.4x; 2.9x=58=>x=20