23х+41х=23.2-7.2 64х=16 х=16/64 х=0.25 32.8-8х=67.2/12 32.8-8х=5.6 8х=32.8-5.6 8х=27.2 х=3.4 19х+45х=169.3-9.3 64х=160 х=2.5 35.5-7х=86.4/16 35.5-7х=5.4 7х=35.5-5.4=30.1 х=30.1/7=4.3