X=10
Explaination:
130=8x+50
-50 -50
80=8x, then divide each side by 8 to get the variable alone
Answer: -5t + 23= 18
Step-by-step explanation: 18 + -3 + -5t + 8 =
(-5t ) + (18 + -3 + 8) = -5t + 23 → 18
Answer:
1156
Step-by-step explanation:
we make 7 * 8 = 56
we retain 5
after 7 * 6 = 42 + 5 = 47
below 6 we put a 0 then after we do 1 * 8 = 8 and 1 * 6 = 6 and finally we all calculate so 476 + 680 = 1156
Answer:
-3.1
Step-by-step explanation:
![a=-1/4=-0.25\\\\-0.5(3a+4)+1.9a-1=\\\\-0.5(3*-0.25+4)+1.9*(-0.25)-1=\\-0.5(-0.75+4)+1.9*(-0.25)-1=\\-0.5(3.25)+1.9*(-0.25)-1=\\-1.625+1.9*(-0.25)-1=\\-1.625-0.475-1=\\-2.1-1=\\-3.1](https://tex.z-dn.net/?f=a%3D-1%2F4%3D-0.25%5C%5C%5C%5C-0.5%283a%2B4%29%2B1.9a-1%3D%5C%5C%5C%5C-0.5%283%2A-0.25%2B4%29%2B1.9%2A%28-0.25%29-1%3D%5C%5C-0.5%28-0.75%2B4%29%2B1.9%2A%28-0.25%29-1%3D%5C%5C-0.5%283.25%29%2B1.9%2A%28-0.25%29-1%3D%5C%5C-1.625%2B1.9%2A%28-0.25%29-1%3D%5C%5C-1.625-0.475-1%3D%5C%5C-2.1-1%3D%5C%5C-3.1)
Answer:
x 2 y -4
Step-by-step explanation:
13x = -54 -20y give it is A
-10x = 60 + 20y give it is B
A + B the sum of the left side of equation is equal to the sum of the right side of equation
13 + (-10x) = -54 -20y + 60 + 20y
3x = 60-54
3x = 6
x=2
so put the x value in A or B equation you can receive y value (B is easier)
y = -4