1)3/8 *х +25=1003/8*х = 100-253/8 *х = 75х= 75 : 3/8= 75/1 * 8/3 = (25*8)/1х= 2002)1/9 *х -20=561/9*х = 56+20х= 76 : 1/9 = 76/1 * 9/1х= 6843)7/15 *х - 50 3/4 = 19 1/47/15 *х = 19 1/4 + 50 3/47/15 *х = 70х= 70 : 7/15 = 70/1 * 15/7 = 10*15х=1504) 40 - 3/8 *х = 35 1/2-3/8 * х = 35 1/2 -40-3/8 * х = - 4 1/2х= - 4 1/2 : (- 3/8 ) = 9/2 * 8/3 = (3*4)/(1*1)х=125) (2 4/5 *х -50) : 2/3 =512 4/5 * х -50 = 51/1 * 2/32 4/5 * х -50 = 102/3 2 4/5 * х = 34 +50х= 84 : 2 4/5 = 84: 14/5 = (84*5)/(1*14) = 6*5х=306)(4 1/2 - 2*х) * 3 2/3 = 11/154 1/2 - 2*х = 11/15 : 3 2/3 4 1/2 - 2*х = 11/15 * 3/114 1/2 - 2*х = 1/52х = 4 1/2 - 1/52х= 4 5/10 - 2/102х= 4 3/10х= 4 3/10 :2 = 43/10 * 1/2 = 43/20х= 2 3/20х= 2,15