Answer:
dont know if this is correct
10x - 20 + 6x + 8 = 180
16x - 12 = 180
16x = 192
x = 12
<em>hope </em><em>this </em><em>helps</em><em>.</em><em>.</em><em>.</em><em>!</em><em>!</em><em>!</em>
Answer:
x = 1/15
Step-by-step explanation:
-5(3x-1+3x) = 3
add like terms:
-5(6x-1) =3
distribute -5 throughout the Parentheses:
-30x+5= 3
move the constant to the right side and change it's sign:
-30x=3-5
calculate:
-30x= -2
Divide both sides by -30:
x = 1/15
Answer: it's not necessary so i can't round to the nearest tenth
<span>1) the solution to the inequality
10x + 18 < −2 is </span><span>A. x<−2
proof: </span>10x + 18 < −2 and <span>10x < −2 -18=-20 so 10x<-20 implies x< -20/10=-2
2) </span><span>the solution to the inequality
−6x + 5 > −1 is </span><span>B. x<1
proof: </span><span>−6x + 5 > −1 -6x>-1-5= -6, - 6x> -6 implies x< -6/-6=1
3) let's solve </span><span>−4.2y + 2.1 > −2.52
</span><span>if −4.2y + 2.1 > −2.52 so </span>−4.2y > −2.52 - <span> 2.1= - 4.62
</span>−4.2y > - 4.62 implies y< <span>- 4.62 / - 4.2=1.1
</span>so y<1.1
4) let's solve <span>−4/3x + 1/6 < 7/9
</span>
if −4/3x + 1/6 < 7/9 then −4/3x < 7/9 -1/6=7/9 -1/6 (multiplied by 3 for each member) we have −4x < 7/3 -1/2=(2x7-1x3)/2x3=11/6, it means −4x < 11/6
and then x>11/-24, x> -11/24
<span>the solution set of
−9.5x−1.5>−30 can be found by solving this inequation,
</span>−9.5x>−30 +1.5 −9.5x> -28.5 so it means x< 28.5/9.5=3
x<3, the solution set is S= ] -infinity, 3[
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