Answer:
Step-by-step explanation:
2. 2(3x+4)=10
6x+8=10
6x+8-8=10-8
6x=2
x= 1/3
3. 2x + 7 = 5x + 16
7 + 2x = 5x + 16
7 + 2x = 16 + 5x
7 + 2x + -5x = 16 + 5x + -5x
7 + -3x = 16 + 5x + -5x
7 + -3x = 16 + 0
7 + -3x = 16
7 + -7 + -3x = 16 + -7
0 + -3x = 16 + -7
-3x = 16 + -7
-3x = 9
x = -3
4. x/3-8=-2
x/3=6
x=18
5. 3x-6=-12
3x-6+6=-12+6
3x=-6
x=-2
sorry but i cannot solve 1 or 6 because i am quite stupid
Answer:
930
Step-by-step explanation:
1) Once upon a time there was a bored kid in class who invented a super cool formula
This formula goes like this:
n(n+1)
where n= the sum of the first n numbers in a series
so
30(30+1)=30(31)=930
930
Answer:
10 and 11
Step-by-step explanation:
Answer:
31x³-60x²+7x-75
Step-by-step explanation:
(30x³-49x³+7x)+(50x³-60x²-75)
(-19x³+7x)+(50x³-60x²-75)
-19x³+50x³+7x-60x²-75
31x³-60x²+7x-75
