3 years ago

30t - 20=70 two step equations

Mathematics

2 answers:

Alenkasestr [34]3 years ago

8 0

Answer:

Hi!

To solve this we can begin by adding 20 to both sides

30t = 90

Next we divide both sides by 30

t = 3

~CoCo

Elza [17]3 years ago

4 0

30t-20=70
+20 +20
____________
90.
30t 90
Divide by 30 on each

T=3

The -20 and +20 cancel out so you just forget about those

The 30t cancels out with the divided by 30 again so it becomes t and 30x3=90

You might be interested in

Solve 3x2 + 4x = −5.

Alla [95]

Move the -5 over by adding 5 to both sides
3x^2+4x+5=0
must use quadratic formula

for an equation in the form
ax^2+bx+c=0
x= $\frac{-b+/- \sqrt{b^2-4ac} }{2a}$

a=3
b=4
c=5

x= $\frac{-4+/- \sqrt{4^2-4(3)(5)} }{2(3)}$
x= $\frac{-4+/- \sqrt{16-60} }{6}$
x= $\frac{-4+/- \sqrt{-44} }{6}$
x= $\frac{-4+/- 2\sqrt{-11} }{6}$
remember that√-1=i
x= $\frac{-4+/- 2i\sqrt{-11} }{6}$
x= $\frac{-2+/- i\sqrt{-11} }{3}$

x= $\frac{-2+ i\sqrt{-11} }{3}$ or x= $\frac{-2- i\sqrt{-11} }{3}$

4 0

3 years ago

Help me please lol !!!!!

STatiana [176]

Answer:

Step-by-step explanation:

8 0

3 years ago

HELP ME PLEASE, I GOT STUCK AND IT'S DUE TODAY!!

Delvig [45]

Answer:

23. 1/5 24.7/10 25. 23/50