1. 7/10+3/5+9/26=91/130+78/130+45/130=214/130
2. х - 3 1/2= 214/130
х= 214/130+ 7/2=214/130+455/130=669/130=5 19/130
1. 7/10+3/5+9/26=91/130+78/130+45/130=214/130
2. х - 3 1/2= 214/130
х= 214/130+ 7/2=214/130+455/130=669/130=5 19/130