3 years ago

7 - 3 ( 5t - 10 ) = 67

2 answers:

6 0

$7-3(5t-10)=67$

$7-(3*5t-3*10)=67$

$7-15t-(-30)=67$

$7-15t+30=67$

$-15t=67-30-7$

$-15t=30$

then...

$t=-\frac{30}{15}$

$\boxed{\boxed{t=-2}}$

anyanavicka [17]3 years ago

6 0

Answer in an annex
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Solve 2x + 5y = −13 3x − 4y = −8

zlopas [31]

If you would like to solve 2x + 5y = -13 and 3x - 4y = -8, you can do this using the following steps:

2x + 5y = -13 /*4
3x - 4y = -8 /*5
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8x + 20y = -52
15x - 20y = -40
_______________
8x + 15x + 20y - 20y = -52 - 40
23x = -92
x = -92 / 23
x = -4

<span>3x - 4y = -8
</span>3 * (-4) - 4y = -8
-12 - 4y = -8
12 + 4y = 8
4y = 8 -12
4y = -4
y = -1

The correct result would be x = -4 and y = -1.

6 0

2 years ago

1. Graph the system of inequalities.

Tamiku [17]

see attached picture of how graph should look.

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