Answer:
D
Step-by-step explanation:
36 can be divided by both 2 & 3
Number of matchsticks required is 2. Rule which matchstick pattern is 2 x n.
Easy it's like regular subtraction
-2 -2=-4 if it's the same sign you add
-2+4=2 different is subtract
Let's solve your equation step-by-step.
x+78=90
Step 1: Subtract 78 from both sides.
x+78−78=90−78
x=12
Please put brainliest!