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2 years ago

14

What is 42 x 3? (try to not use a calculator though) I don't actually need this to be solved but, I want to see if you guys can

use mental math to solve this problem! :)

2 answers:

laila [671]2 years ago

6 0

Answer:

126

Step-by-step explanation:

42 times 3 = 126

ryzh [129]2 years ago

6 0

Answer:

Step-by-step explanation:

42*3=126

2*3=6

40*3=120

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8/5 ( 2x + 13 ) - 3 = 22

Alona [7]

Answer:

$x = \frac{21}{16}$ = 1 5/16

[/tex] 1 \frac{5}{16}[/tex]

Step-by-step explanation:

$\frac{8}{5} (2x + 13) - 3 = 22$

Expand

$\frac{16}{5} x + \frac{104}{5} - 3 = 22 \\ \frac{16}{5} x + \frac{89}{5} = 2$

Collect like terms and simplify

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Cross Multiply

$80x = 105$

Divide both sides of the equation by 80

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