step-by-step explanation:
b
2.14x - 12.18 = -5.76
add 12.18 to each side
2.14x -12.18 +12.18 = -5.76 +12.18
2.14 x =6.42
divide by 2.14
2.14x/2.14 = 6.42/2.14
x=3