The answer is 45 because supplement means the sum of 180 so 180 divided by 4 is 45 and t=45
In the step after -6x+10=4x+20, he moved the terms incorrectly. you have to add 6x to both sides so it would be 10=4x+6x+20 which simplifies to 10=10x+20. subtract 20 from both sides to get -10=10x. divide both sides by 10. the answer is x=-1
Answer:
12
Step-by-step explanation:
divide both sides by negative 2
square both sides
6x+3=81
6x=78
x=12