Answer:
B and C
Step-by-step explanation:
They want you to combine the variables. So
−12x4 + 7x3 + 6x4 − 2x3 =
<span>5x3 − 6x4
</span>So you combine the coefficients, not the variable number, for instance -12+6=-6, and then you simply put the variable in the same place it was. You don't do anything else with it except what I just showed you : )
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A) x=4
B) x= -3
C) x= -1/6
D) x=24
Answer:
x=20
Step-by-step explanation:
x+(3x+10)=90
4x+10=90
4x=80
x=20