serianmollel
serianmollel
30.11.2020 • 
Mathematics

Prove: X = 30 V
60° R
(4x)
w
S
What is the missing reason in step 3?
Statements
1. mZTRV=60°; mZTRS = (4x)
2. ZTRS and ZTRV are a linear pair
3. mZTRS+ mZTRV = 180
4. 60+ 4x = 180
5. 4x = 120
6. X=30
Reasons
1. given
2. definition of linear pair
3. ?
4. substitution property of equality
5. subtraction property of equality
6. division property of equality

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