Помогите решить:-7х-4=-9х+6;-0,3 (х-2)=0,6+0,2 (х-4);(15,54÷(-4,2)-2,5)×1,4+1,08;

-7х-4=-9х+6-7х+9х=6+42х=10х=10:2х=5-0,3 (х-2)=0,6+0,2 (х-4)-0.3х+0.6=0.6+0.2х-0.8-0.3х-0.2х=0.6-0.8-0.6-0.5х=-0.8х=-0.8:(-0.5)х=1.6(15,54÷(-4,2)-2,5)×1,4+1,08=-7.615.54:(-4.2)=-3.7-3.7-2.5=-6.2-6.2*1.4=-8.68-8.68+1.08=-7.6