Answer:
for the first one, x + 3 * y = 5
and the second equation, x - y = 5
Step-by-step explanation:
the sum of two numbers means for example the sum of 5 and 8 is 13, so as an equation that is 5 + 8 = 13
the difference is the same thing as the sum but it's subtraction.
and then times is just multiplication.
7*5*3*2^5
3360/2
1680*2
840*2^2
210*2^4
105*2^5
21*5*2^5
x = 59°
y = 67°
x = y - 8
x + y + 54 = 180
(y - 8) + y = 180 - 54
2y - 8 = 126
2y = 134
7) 5+4 = 9
4+5=9
8) 6+5 = 11
5+6 = 11
9) 6+7 = 13
7+6 = 13
10) 7+8 = 15
8+7 = 15
11) 8+9 = 17
9+8 = 17
12) 5+6 = 11
6+5 = 11
13) 7+6 = 13
6+7 = 13
14) 9+8 = 17
8+9 = 17
773 milligrams
1000-223=773
