30t - 20=70 two step equations
2 answers:
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
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
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