Solve this using substitution method. Many many thanks
2 answers:
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
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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