-224=a-0.3(1000)

Solution for -224=a-0.3(1000) equation:

Simplifying
-224 = a + -0.3(1000)

Multiply -0.3 * 1000
-224 = a + -300

Reorder the terms:
-224 = -300 + a

Solving
-224 = -300 + a

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-1a' to each side of the equation.
-224 + -1a = -300 + a + -1a

Combine like terms: a + -1a = 0
-224 + -1a = -300 + 0
-224 + -1a = -300

Add '224' to each side of the equation.
-224 + 224 + -1a = -300 + 224

Combine like terms: -224 + 224 = 0
0 + -1a = -300 + 224
-1a = -300 + 224

Combine like terms: -300 + 224 = -76
-1a = -76

Divide each side by '-1'.
a = 76

Simplifying
a = 76