What is the value of a-3c​

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?

Simplify each expression. use positive exponents. show work . (x –2 y –4 x 3 ) –2

Given: m zade = 60° and m2cdf = (3x + 15) prove: x = 15