X = 7/4
y = 3/2
z = -5/4
Step 1: Multiply first equation by
<span>−3</span> and add the result to the third equation. The result is:
<span><span> x</span><span><span>+ 2 y</span><span>+ 3 y</span><span>− 8 y</span></span><span><span>− z</span><span>− 2 z</span><span>+ 8 z</span></span><span><span> = 6</span><span> = 7</span><span> = −22</span></span></span>
Step 2: Multiply second equation by 4 and add the result to the third equation. The result is:
<span><span> x</span><span><span>+ 2 y</span><span>+ 3 y</span><span>+ 4 y</span></span><span><span>− z</span><span>− 2 z</span></span><span><span> = 6</span><span> = 7</span><span> = 6</span></span></span>
Step 3: solve for y.
<span><span><span>4 y</span>y</span><span><span>=6</span><span>=<span>32</span></span></span></span>
Step 4: solve for z.
<span><span><span>3z−2z</span><span>3⋅<span>32</span>−2z</span>z</span><span><span>=7</span><span>=7</span><span>=−<span>54</span></span></span></span>
Step 5: solve for x by substituting <span>y=<span>32</span></span> and <span>z=−<span>54</span></span> into the first equation.
Answer:
nnnnnnnnnnnnoooo clueeeeeeeeee
Step-by-step explanation:
Answer:
160 2p coins
Step-by-step explanation:
3/8 x 640 = 240 = 1p coins
240 = 5p coins
240 + 240 = 480
640 - 480 = 160
X cannot equal -5 because it would make the denominator equal to zero
Answer:
9
Step-by-step explanation:
so sorry if im too late...
