Tentukan penyelesaian dari persamaan berikut.. a. 2(5 - x) = 4(2x - 5) b. 3(4x - 5) = 2(3x + 8)

a. 10-2x = 8x -20 => 10x = 30 => x=3
b. 12x-15 = 6x+16 => 6x = 31 => x= 5,16

a. 2(5-x)=4(2x-5)
    = 10-2x = 8x-20
    = 10+20 = -20x+2x
    = 30 =-18x
    
b. 2(4x-5) = 2(3x+8)
    = 8x-10 = 6x+16
    = 8x-6x = 16+10
    = 2x = 26
    = x = 26/2 = 13