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4 years ago

PLEASE HELP ME !! Solve the system of equations using Substitution or Linear Combination (your choice). Show all work

Mathematics

2 answers:

luda_lava [24]4 years ago

8 0

Okay so 3x-6(1/2x+4)=-12. 3x-3x-24=-12. x-24=-12.x=-36

Likurg_2 [28]4 years ago

6 0

OK...I saw the original question with variables. Using subtraction we get...

y = -1/2x +4 ... 1/2x + y = 4 (add x to both sides so equations are same)
3x - 6y = 12

multiply first equation by 6 to be able to subtract 6(1/2x +y = 4)

new equations..... 3x + 6y = 24
3x - 6y = -12 (subtract two equations...

6x = 12 (divide by 6 we get x = 2.

substitute x into original equation to get y...

y = -1/2x + 4
y = -1/2 (2) + 4
y = -1 + 4
y = 3 answer (2, 3)

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$\begin{gathered} +(5x+4)\leq10 \\ 5x\leq10-4 \\ 5x\leq6 \\ x\leq\frac{6}{5} \\ x\leq1.20 \end{gathered}$

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see the attached figure to better understand the problem

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