б)а=6(6+2b) и -3 a +b/2 = -37 а=36+12b и -3(36+12b)+b/2=-37 а=36+12b и -108-36b+b/2=-37 а=36+12b и -35,5b=-37+108 а=36+12b и -35,5b=71 и а=36+12b иb=-2 a=36+12(-2)и b=-2 a=12и b=-2 г)7х - 3у/5 = -4 и х + 2у/5 = -3 7х - 3у/5 = -4 и x=-3-2y/5 7(-3-2y/5)-3y/5=-4 и x=-3-2y/5 -21-14y/5-3y/5=-4 и x=-3-2y/5 -17y/5=17 и x=-3-2y/5 y=-5 и x=-3-2(-5)/5 y=-5 и x=-1