Answer:
10
Step-by-step explanation:
Let's solve your equation step-by-step.
3(5−2x)+9x=45
Step 1: Simplify both sides of the equation.
3(5−2x)+9x=45
(3)(5)+(3)(−2x)+9x=45 (Distribute)
15+−6x+9x=45
(-6x+9x)+(15)=45 (Combine Like Terms)
3x+15=45 3x+15= 45
Step 2: Subtract 15 from both sides.
3x+15−15=45−153x=30
Step 3: Divide both sides by 3.
3/3=30/3
x=10
Answer:
x=10
Answer:
Note that ( − 9 x − 45 ) = ( − 9 ) ( x + 5 ) and that ( x 3 + 5 x 2 ) = ( x 2 ) ( x + 5 ) We can write x 3 + 5 x 2 − 9 x − 45 XXX = ( x 2 − 9 ) ( x + 5 ) If we further note that ( x 2 − 9 ) is the difference of squares ( x + 3 ) ( x − 3 ) we can expand this to x 3 + 5 x − 9 x − 45 XXX = ( x + 3 ) ( x − 3 ) ( x + 5 )
Step-by-step explanation:
