Решите уровнения. 1) 3х+5х+7х=60; 2) 19х-12х=4,9; 3) 8х+3х+1,6=1,93; 4) 14х-4х-2,8=11,2.
1)х=4
a)3x+5x+7x=6015x=60x=4b)19x-12x=4.97x=4.9x=0.7v)8х+3х+1,6=1,9311x=1.93-1+6x=0.3g)14х-4х-2,8=11,210x=11.2+2.8x=1.4