1.х+3х=356
2.х=5-148
3.4х+114+х+х=456
4.3х+5(х-68)=316
5.7х-38=х-14+78

1)4х=356х=892)х=-1433)6х=342х=574)8х=656х=825)6х=102х=17

1. x+3x=4x 4x=356 x=356/4=892/ x=5-148 x=-1433/ 4x+114+x+x=456 4x+x+x=456-114 6x=352 x=342/6 x=474/ 3x+5(x-68)=316 3x+5x-340=316  8x=656 x=656/8 x=825/ 7x-38=x-14+78 7x-x=-14+78+38 6x=102 x=47