Question

Determine os valores de A,B e C,com as contas:
6X+3(4-X)=2X+15

6X+A-3X=2X+15

BX=2X+C

X=C

Answer 1

6x + 12 - 3x - 2x = 15
x = 15 -12 = 3
x = 3 ****
6x + A -3X = 2X + 15
3X + A - 2X = 15
X + A  = 15
(3) + A = 15
A = 15 - 3
A = 12 ****

BX = 2X + C    mas   x = C logo   x = 3  e   C = 3 
3B = 2(3) + 3
3B = 6 + 3
3B = 9
B= 3 *****

C = 3 *****