Given: m zade = 60° and mzcdf = (3x + 15)
prove: x = 15
what is the missing statement and the missing reason in
step 5?
statements
reasons
1 mzade - 60
1. given
mzcdf -(3x - 15)
2. zade and 2cdf are vert. s 2. def. of vert 25
3. zade - acof
3. vert 25
4. mzade - m4cdf
4 det of a
5 ?
5 7
8.45-34
6. subtr prop
7. 15-x
17 div. prop
(3x 15)
o
statement: 60 = 3x + 15, reason: substitution
statement x = 15, reason: subtraction property of
equality
statement: 60 = 3x + 15, reason: transitive property
statement x = 15, reason: subtraction and division
properties of equality
o