An equation where variables are used to represent known values—function notation true or false

Use the multiplier method to incrases £258 by 43%

For the equations below which statement is true ? -2x=14 6x=-42

1. ∠1 is complementary to ∠2 and ∠3 is complementary to ∠2. subtraction property of equality 2. m∠1 + m∠2 = 90 and m∠3 + m∠2 = 90 substitution 3. m∠1 + m∠2 = m∠3 + m∠2 definition of complementary 4. m∠1 = m∠3 given