Question

Найдите корни уравнения:
7(х+6)=4(5х+4)

Answer 1

7(х+6)=4(5х+4)=(7х+42)=(20х+16)
7х+42=20х+16
7х-20х=42-16
-13х=26
х=26/-13
х=-2

Answer 2

7(х+6)=4(5х+4), 7х+42=20х+16, 7x-20x=16-42, -13x=-26, x=2

Answer 3

1,5(х+8)=-4х+1

Answer 4

1,5(х+8)=-4х+1; 1,5х+12=-4х+1; 1,5x-(-4x)=1-12; 5,5x=-11; x=-2