Answer:
4 : 39
5 : 52
6 : 67
7 : 77
Step-by-step explanation:
<span>[3a2 + (–3a2)] + (–5ab + 8ab) + (b2 + 2b2)</span><span>
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The pair of equations:
y = x + 4
y = -2x - 2
To solve the system of equation by substitution, you would substitute one variable for it's equivalent expression. Combining the pair of equations into one equation in only one variable. The easiest way to do this is by substituting out the variable y because it is already alone on one side of the equal sign. Substitute the y in the second equation for: x+4
x+4 = -2x - 2
solve for x
x + 2x = -2 -4
3x = -6
x = -2
now use the value for x to find y by putting into either equation.
y = x + 4
y = (-2) + 4
y = 2
solution is: (-2, 2)
Answer:
um ok
Step-by-step explanation:
Answer: " r = a + b - s " .
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Step-by-step explanation:
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Given:
a + b = s + r ; Solve for: "r" ; that is; rewrite the equation in terms of: " r " .
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Subtract "s" from each side of the equation;
to isolate "r" on one side of the equation:
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→ a + b - s = s + r - s ;
→ to get:
→ a + b - s = r ;
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↔ " r = a + b - s " .
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→ which is the answer.
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Hope this helps!
Best wishes to you!
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