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MrMuchimi
2 years ago
10

Solve this using substitution method. Many many thanks

Mathematics
2 answers:
In-s [12.5K]2 years ago
8 0

Answer:

y=2 and x=1

Step-by-step explanation:

sub 2 into 1

3(15-7y) + 4y= 11

45 - 21y +4y =11

-21y+4y= 11-45

-17y= - 34

y=2

Therefore sub y into x equation

x=15-7(2)

x= 1

e-lub [12.9K]2 years ago
5 0

Answer:

<em>3x</em><em> </em><em>+</em><em> </em><em>4y</em><em> </em><em>=</em><em> </em><em>1</em><em>1</em>

x = 15 -7 y

3 (15-7y) = 11

45 - 21y + 4y = 11

45 - 17 y = 11

-17 y =11 -45

-17y ÷ -17 = -34 ÷ -17

y = 2

<em>x</em><em> </em><em>=</em><em> </em><em>1</em><em>5</em><em> </em><em>-</em><em> </em><em>7y</em>

<em>x</em><em> </em><em>=</em><em> </em><em>1</em><em>5</em><em> </em><em>-</em><em> </em><em>7</em><em>(</em><em>2</em><em>)</em>

<em>x</em><em> </em><em>=</em><em> </em><em>1</em><em>5</em><em> </em><em>-</em><em> </em><em>1</em><em>4</em>

<em>x</em><em> </em><em>=</em><em> </em><em>1</em>

<em>there</em><em> </em><em>for</em><em> </em><em>y</em><em> </em><em>=</em><em> </em><em>2</em><em> </em><em>and</em><em> </em><em>x</em><em> </em><em>=</em><em> </em><em>1</em><em> </em><em>is</em><em> </em><em>the</em><em> </em><em>solution</em>

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