Question

810. Решите уравнения: 1-x 3 1) 4-7x 15 + 4 2x + 1 5 2) 10-y 3y+8 6 3 + - У +6 2​

Answer 1

(4-7х)/15 + (1-х)/3 =4 - (2х+1)/54-7х+5(1-х)=4*15 - 3(2х+1)4 - 7х+5 - 5х=60 - 6х - 36х= - 48х= - 8(10-у)/6 +(3у+8)/3=(у+6)/210-у+2(3у+8)=3(у+6)10-у+6у+16=3у+182у= - 8у= - 4(3х+5)/5 +(9х -5)/4=6 +(3х+1)/24(3х+5)+5(9х-5)=6*20+10(3х+1)12х+20+45х-25=120+30х+1027х=135х=135:27х=5(5-9х)/8 - (3+5х)/4=(5-3х)/25-9х -2(3+5х)=4(5-3х)5-9х - 6 - 10х=20 - 12х7х= - 21х= - 3.